Childhood pancreatic tumors: a single institution experience

Unraveling the landscape of pediatric pancreatic tumors: Insights from Japan

Pediatric pancreatic tumors, though rare, pose significant diagnostic and management challenges. The recent, 22-year nationwide survey on pediatric pancreatic tumors in Japan by Makita et al offers valuable insights into this uncommon entity, revealing striking geographical variations and questioning current treatment paradigms. This editorial commentary analyzes the study's key findings, including the predominance of solid pseudopapillary neoplasms and their younger age of onset, which contrast sharply with Western data. It explores the implications for clinical practice and research, emphasizing the need for population-specific approaches to diagnosis and treatment. The revealed limited institutional experience and surgical management patterns prompt a reevaluation of optimal care delivery for these complex cases, suggesting benefits of centralizing healthcare services. Furthermore, the commentary advocates for international collaborative studies to elucidate the genetic, environmental, and lifestyle factors influencing the development and progression of pediatric pancreatic tumors across diverse populations. It also outlines future directions, calling for advancements in precision medicine and innovative care delivery models to improve global patient outcomes. Unraveling Makita et al's findings within the broader landscape of pediatric oncology can stimulate further research and clinical advancements in managing pancreatic and other rare tumors in children.

Pancreatic Surgery in Children: Complex, Safe, and Effective

OBJECTIVE

The aim of this study was to assess indications for and report outcomes of pancreatic surgery in pediatric patients.

BACKGROUND

Indications for pancreatic surgery in children are rare and data on surgical outcomes after pediatric pancreatic surgery are scarce.

METHODS

All children who underwent pancreatic surgery at a tertiary hospital specializing in pancreatic surgery between 2003 and 2022 were identified from a prospectively maintained database. Indications, surgical procedures, and perioperative as well as long-term outcomes were analyzed.

RESULTS

In total, 73 children with a mean age of 12.8 years (range: 4 mo to 18 y) underwent pancreatic surgery during the observation period. Indications included chronic pancreatitis (n=35), pancreatic tumors (n=27), and pancreatic trauma (n=11). Distal pancreatectomy was the most frequently performed procedure (n=23), followed by pancreatoduodenectomy (n=19), duodenum-preserving pancreatic head resection (n=10), segmental pancreatic resection (n=7), total pancreatectomy (n=3), and others (n=11). Postoperative morbidity occurred in 25 patients (34.2%), including 7 cases (9.6%) with major complications (Clavien-Dindo≥III). There was no postoperative (90-d) mortality. The 5-year overall survival was 90.5%. The 5-year event-free survival of patients with chronic pancreatitis was 85.7%, and 69.0% for patients with pancreatic tumors.

CONCLUSION

This is the largest single-center study on pediatric pancreatic surgery in a Western population. Pediatric pancreatic surgery can be performed safely. Centralization in pancreatic centers with high expertise in surgery of adult and pediatric patients is important as it both affords the benefits of pancreatic surgery experience and ensures that surgical management is adapted to the specific needs of children.

Prognostic factors of pancreatic tumors in children and adolescents: a population study based on the surveillance, epidemiology, and end results database

PURPOSE

Pancreatic tumors in children are uncommon, and data is scarce. The purpose of this study is to examine the prognostic factors of pediatric pancreatic tumors in a population-based cohort.

METHODS

The Surveillance, Epidemiology, and End Results (SEER) database was used to identify all pediatric patients with pancreatic tumors diagnosed between 1975 and 2018. The overall survival (OS) rates were determined using a Kaplan-Meier analysis. The log-rank test was used for univariate survival analysis. Cox proportional-hazards regression was used to determine the variables related to OS.

RESULTS

We identified 195 children with pancreatic tumors, with a median age at diagnosis of 16 years. Tumors were classified as neuroendocrine tumors (33.8%), solid pseudopapillary tumors (SPTs) (32.3%), pancreatoblastoma (11.3%), and others (22.6%). Of the patients, 30.3% had distant metastases, and 69.7% had surgery. Pancreatoblastomas were more common in younger children, whereas solid pseudopapillary tumors were more common in female patients. Overall 1-year, 3-year, and 5-year survival rates for all patients were 90.3%, 79.2%, and 77.7%, respectively. The Cox proportional hazard regression revealed that SEER stage and surgery were significant independent predictors of overall survival.

CONCLUSIONS

Pancreatic tumors are rare in children, and overall survival is grim except for SPTs. SEER stage and surgery were determined to be the most relevant determinants of OS in our study.

The Broad Spectrum of Paediatric Pancreatic Disease: A Single-center 26-years Retrospective Review

BACKGROUND

Paediatric pancreatic pathology and its management is rarely described. We present our experience.

METHODS

A retrospective case-note review of all patients with pancreatic disease from 1995 to 2021 was completed. Data are quoted as median (range).

RESULTS

Two hundred and twelve patients were identified with 75.9% presenting with pancreatitis. Referrals for pancreatitis increased during the study period and affected a wide age range (2 months-15.6 years). Acute pancreatitis (n = 118) (age 10.6 (0.18-16.3) years). The most common causes were idiopathic (n = 60, 50.8%) and biliary (n = 28, 23.8%). About 10% required treatment for complications or underlying biliary causes. Recurrent pancreatitis (n = 14) (11.6 (0.3-14.3) years). The most common cause was hereditary pancreatitis (n = 6, 42.9%). One patient required endoscopic drainage of pseudocyst. Chronic pancreatitis (n = 29) (16 (0.38-15.5) years). The underlying diagnosis was idiopathic (n = 14, 48.4%) or hereditary pancreatitis (n = 10, 34.5%). 13 patients required active management, including pancreaticojejunostomies (n = 5). Blunt Trauma (n = 34) was managed conservatively in 24 (70.5%). 6 patients required open surgery, but 4 were managed by either endoscopy or interventional radiology. Pancreatic tumours (n = 13) presented at 11.2 (2.3-16) years. Pathology included pancreaticoblastomas (n = 3), solid pseudopapillary tumours (n = 3), neuroendocrine tumours (n = 2), acinar cell cystadenoma (n = 1), intraductal papillary mucinous neoplasm (n = 1), pancreatic insulinoma (n = 1), pancreatic ductal adenocarcinoma (n = 1), and embryonal rhabdomyosarcoma (n = 1). OTHERS (N = 4): Pancreatic cyst (n = 3) and annular pancreas (n = 1).

CONCLUSION

Paediatric pancreatic disease spans a wide spectrum of both benign and malignant disease and benefits from access to specialist medical, surgical, endoscopic, and interventional radiology expertise. Referrals for paediatric pancreatitis are increasing, but aetiology is different to that seen in adults.

LEVEL OF EVIDENCE

IV.

Long-term outcome of pancreatic function following oncological surgery in children: Institutional experience and review of the literature

BACKGROUND

Pancreatic neoplasms are uncommon in children and in most cases they are benign or have low malignant potential. Pancreatoblastoma and solid pseudopapillary tumor are the most frequent types in early and late childhood, respectively. Complete resection, although burdened by severe complications, is the only curative treatment for these diseases. Pancreatic surgery may result in impaired exocrine and endocrine pancreatic function. However, limited data are available on the long-term pediatric pancreatic function following surgical resection.

AIM

To investigate endocrine and exocrine pancreatic function and growth after oncological pancreatic surgery in a pediatric series.

METHODS

A retrospective analysis of all pediatric patients who underwent surgery for pancreatic neoplasm in our Institution from January 31, 2002 to the present was performed. Endocrine and exocrine insufficiency, auxological and fat-soluble vitamin status (A, D, E and clotting tests) were assessed at diagnosis and at every follow-up visit. Exocrine insufficiency was defined as steatorrhea with fecal elastase-1 < 200 µg/g stool, while endocrine insufficiency was identified as onset of Diabetes or Impaired Glucose Tolerance. Growth was evaluated based on body mass index (BMI) z-score trend.

RESULTS

Sixteen patients (12 girls and 4 boys, mean age 10.7 ± 5.3 years), were included. Nine patients (56%) had a neoplasm in the pancreatic head, 4 in the body/tail, 2 in the tail and 1 in the body. Histological findings were as follows: Solid pseudopapillary tumor in 10 patients (62.5%), insulinoma in 2 patients, neuroendocrine tumor in 2 patients and acinar cell carcinoma in 2 patients. The most frequent surgery was pancreaticoduodenectomy (50%). Exocrine failure occurred in 4 patients (25%) and endocrine failure in 2 patients (12.5%). Exocrine insufficiency occurred early (within 6 mo after surgery) and endocrine insufficiency later (8 and 10 years after surgery). Mean BMI z-score was 0.36 ± 1.1 at diagnosis and 0.27 ± 0.95 at the last assessment. Vitamin D was insufficient (< 30 ng/mL) in 8 of the 16 patients during the follow-up period. Vitamins A, E and clotting test were into the normal ranges in all patients.

CONCLUSION

Careful and long-term monitoring should follow any pancreatic surgery, to recognize and promptly treat exocrine and endocrine pancreatic insufficiency, which can occur after surgery.

Could the burden of pancreatic cancer originate in childhood?

The presence of pancreatic cancer during childhood is extremely rare, and physicians may be tempted to overlook this diagnosis based on age criteria. However, there are primary malignant pancreatic tumors encountered in pediatric patients, such as pancreatoblastoma, and tumors considered benign in general but may present a malignant potential, such as the solid pseudo-papillary tumor, insulinoma, gastrinoma, and vasoactive intestinal peptide secreting tumor. Their early diagnosis and management are of paramount importance since the survival rates tend to differ for various types of these conditions. Many pediatric cancers may present pancreatic metastases, such as renal cell carcinoma, which may evolve with pancreatic metastatic disease even after two or more decades. Several childhood diseases may create a predisposition for the development of pancreatic cancer during adulthood; hence, there is a need for extensive screening strategies and complex programs to facilitate the transition from pediatric to adult healthcare. Nevertheless, genetic studies highlight the fact the specific gene mutations and family aggregations may be correlated with a special predisposition towards pancreatic cancer. This review aims to report the main pancreatic cancers diagnosed during childhood, the most important childhood diseases predisposing to the development of pancreatic malignancies, and the gene mutations associates with pancreatic malignant tumors.

Treatment patterns and outcomes for pancreatic tumors in children: an analysis of the National Cancer Database

PURPOSE

Pancreatic tumors are rare in children and limited data are available regarding incidence, treatment, and outcomes. We aim to describe patient and tumor characteristics and to report on survival of these diseases.

METHODS

Children with pancreatic tumors were queried from the National Cancer Database (2004-2014). The association between treatment and hazard of death was assessed using Kaplan-Meier method and Cox regression model.

RESULTS

We identified 109 children with pancreatic tumors; 52% were male and median age at diagnosis was 14 years. Tumors were distributed as follows: pseudopapillary neoplasm (30%), endocrine tumors (27%), pancreatoblastoma (16%), pancreatic adenocarcinoma (16%), sarcoma (6%) and neuroblastoma (5%). Seventy-nine patients underwent surgery, of which 76% achieved R0 resection. Most patients (85%) had lymph nodes examined, of which 22% had positive nodes. Five-year overall survival by tumor histology was 95% (pseudopapillary neoplasm), 75% (neuroblastoma), 70% (pancreatoblastoma), 51% (endocrine tumors), 43% (sarcoma), and 34% (adenocarcinoma). On multivariable analysis, surgical resection was the strongest predictor of survival (HR 0.26, 95% CI 0.10-0.68, p < 0.01).

CONCLUSION

Overall survival of children with pancreatic tumors is grim, with varying survival rates among different tumors. Surgical resection is associated with improved long-term survival.

A systematic review and meta-analysis of predictors of recurrence in patients with Solid Pseudopapillary Tumors of the Pancreas

BACKGROUND

The recurrence rates and predictors of recurrence in patients with Solid Pseudopapillary tumors (SPT) are unclear, which makes it challenging to determine the duration of follow-up. The aim of the current study was to perform a systematic review and meta-analysis to determine the recurrence rates and pathologic factors associated with recurrence in patients with SPT.

METHODS

A PubMed, Scopus, and Web of Science search was conducted to identify studies of SPT published during the last 15 years: (09/2002-09/2017). Studies reporting on patients with SPT and follow-up of >5 years were included. The search strategy was conducted per 2009 PRISMA guidelines.

RESULTS

A total of 103 studies reporting on 2599 non-metastatic SPT patients were identified. Sixty-nine patients (2.6%) developed recurrence during follow-up. Pooled estimates from studies with a sample size >20 (N = 33) noted an overall recurrence rate of 2% (95% CI 1-2%). Male gender (OR 1.960), positive lymph nodes (OR 11.9), R1 margins (OR 11.1), and LVI (OR 5.5), were associated with a significantly (all p < 0.05) increased risk of recurrence.

CONCLUSION

Current meta-analysis suggests that only 2% of patients with SPT experience recurrence after resection. These data will guide the treating physicians and patients regarding recurrence rates and help identify patients at increased risk of recurrence during follow-up.

Pediatric gastroenteropancreatic neuroendocrine tumor: A case report and review of the literature

INTRODUCTION

Gastroenteropancreatic neuroendocrine tumors (GEP-NETs) are a heterogeneous group of epithelial neoplasms originating from the diffuse neuroendocrine cell system of the gastrointestinal tract and pancreas. They are very rare, especially in pediatric age, and vary widely in terms of clinical presentation, malignant potential, and prognosis.

PATIENT CONCERNS

A 9 years' old, white female child presented with abdominal pain and diarrhea mixed with bright red blood lasting 2 days followed by hematemesis.

DIAGNOSIS

Routine laboratory tests revealed microcytic anemia. Upper endoscopy showed a 20-mm polypoid lesion in the posterior wall of the duodenal bulb. Biopsy specimens were taken and histologic analysis showed a well-differentiated neuroendocrine tumor G1, with a ki-67 index <2%, an expression of chromogranine A (CgA), synaptophysin and somatostatin receptor type 2A (SSTR2A). Endoscopic ultrasound showed a 21-mm hypoechoic, hypervascular lesion involving the mucosal, submucosal, and muscular layers and a 15-mm hypoechoic round periduodenal lymph node. Gallium-68-somatostatin receptor positron emission tomography (PET with Ga-DOTATOC) showed one area of tracer uptake in the duodenum and other one near the duodenum compatible with the primary tumor site and a lymph node respectively. All the tests confirmed the diagnosis of a GEP-NET of the duodenal bulb, with a single lymph-node metastasis.

INTERVENTIONS

The patient underwent an open duodenal wedge resection.

OUTCOMES

The follow-up at 6, 24, and 36 months and then yearly after surgery for a total of 42 months showed no evidence of recurrence.

CONCLUSION

Duodenal neuroendocrine tumors represent 1% to 3% of all GEP-NETs. They are rare in adults and extremely rare in children. Therefore, the diagnostic and therapeutic approach should be multidisciplinary, including laboratory, endoscopic, and specific imaging tests and strictly follows guidelines, to avoid misdiagnosis and inadequate treatments. Although the prognosis is benign in most cases, they can present with metastases. Therefore, a careful follow-up is extremely important.

Minimally Invasive Approaches to Pediatric Solid Tumors

Over the last decade, driven in part by the favorable adult experience and a crescendoing number of case series and retrospective reports in the pediatric surgical literature, minimally invasive surgical (MIS) approaches are increasingly used as adjunctive or definitive surgical treatments for an ever-expanding list of pediatric tumors. Although most current treatment protocols lack surgical guidelines regarding the use of MIS, this growing body of MIS literature provides a framework for the development of multicenter trial groups, prospective registries, and further centralization of subspecialist services. This article highlights the current available data on MIS approaches to a variety of pediatric malignancies.

Solid pseudopapillary and malignant pancreatic tumors in childhood: A systematic review and evidence quality assessment

A systematic review of 32 studies reporting on 489 children with pancreatic tumors was performed. The most prevalent histologic subtype was solid pseudopapillary tumor (SPT) (61.3%). Pancreaticoduodenectomy was the most commonly performed operation (48%). Neoadjuvant chemo/radiotherapy was utilized in 3.9, 36.2, 25, and 27.8% of patients with SPTs, pancreatoblastomas (PBLs), neuroendocrine tumors, and exocrine carcinomas, respectively. Adjuvant chemotherapy (75.6%) and radiation (34%) were most commonly utilized in PBLs. All-cause mortality was highest in exocrine carcinomas (50%). Overall, 98.8% of patients with SPTs survived. PBL exhibited the highest recurrence rate (14.7%) within a mean of 23.5 months.

Solid pseudopapillary tumour (Frantz's tumour) of the pancreas in childhood: successful management of late liver metastases with sunitinib and chemoembolisation

The patient is a girl aged 17 years who originally presented at age 11 years with a solid pseudopapillary tumour (SPT) in the head of the pancreas treated by an R0 pylorus-preserving Whipple procedure. The patient underwent surveillance CT every 3 months for the first year followed by MRI every 6 months. She was noted to have a new liver lesion in Couinaud segment VI highly suspicious for metastasis at 30 months. Liver wedge biopsy confirmed metastatic SPT. Two months later two new lesions were noted in Couinaud segment VII. The family preferred medical management to surgery resulting in a treatment combination of the tyrosine kinase inhibitor sunitinib and hepatic artery embolisation. The patient developed a hepatic abscess following embolisation but recovered with antibiotics. The patient has subsequently been followed with serial MRIs every 3 months, and 20 months following chemoembolisation, she has no evidence of recurrence of the metastases.

Pancreatic solitary fibrous tumor in a toddler managed by pancreaticoduodenectomy: a case report and review of the literature

Solitary fibrous tumor (SFT) of the pancreas is rare, with 15 adult cases reported in the English literature. We described a 14-month-old boy who presented with obstructive jaundice. Dominantly elevated serum CA19-9 was detected. Imaging studies revealed a well-circumscribed, solid mass in the pancreatic head. A pancreaticoduodenectomy (child procedure) was performed using Shen’s anastomosis technique. After resection of the tumor, liver function and serum tumor markers normalized and clinical signs receded. The boy was disease free after a follow-up of 12 months. Histological examination showed the tumor consisted of “patternless pattern” arranged spindle tumor cells and keloid-like hyalinized collagen. Immunohistochemical staining was positive for CD34 and vimentin. Mutation analysis of CTNNB1 was negative. To the best of our knowledge, our patient was the first case of pancreatic SFT in a pediatric population. SFT should be considered in differential diagnosis when confronted with a pancreatic tumor in children. Complete resection should be meticulously pursued.

Pancreaticoduodenectomy for pediatric and adolescent pancreatic malignancy: A single-center retrospective analysis

PURPOSE

While pancreaticoduodenectomy (PD) has been extensively studied in adults, there are few data pertaining specifically to pediatric patients. We retrospectively analyzed PD-associated morbidity and mortality in pediatric patients.

METHODS

Our analytic cohort included all consecutive patients ≤18years of age treated at our institution from 1993 to 2015 who underwent PD. Patient data (demographics, disease characteristics, surgical and adjuvant treatment, length of hospital stay, and postoperative course) were extracted from the medical records.

RESULTS

We identified 12 children with a median age of 9years (7 female, 5 male). Final diagnoses were pancreatoblastoma (n=3), solid pseudopapillary tumor (n=3), neuroblastoma (n=2), rhabdomyosarcoma (n=2), and neuroendocrine carcinoma (n=2). Four patients underwent PD for resection of recurrent disease. 75% (9/12 patients) received neoadjuvant therapy. The median operative time was approximately 7hours with a mean blood loss of 590cm³. The distal pancreas was invaginated into the posterior stomach (n=3) or into the jejunum (n=5) or was directly sewn to the jejunal mucosa (n=4). There were no operative deaths. There were 4 patients (34%) with grade II complications, 1 with a grade IIIb complication (chest tube), and 1 with a grade IV complication (reexploration). The most common long-term morbidity was pancreas exocrine supplementation (n=10; 83%). Five patients (42%) diagnosed with either solid pseudopapillary tumor or rhabdomyosarcoma are currently alive with a mean survival of 77.4months.

CONCLUSION

Pancreaticoduodenectomy is a feasible management strategy for pediatric pancreatic malignancies and is associated with acceptable morbidity and overall survival. Long-term outcome is mostly dependent on histology of the tumor.

LEVEL OF EVIDENCE

Level IV; retrospective study with no comparison group.

Recurrence of Solid Pseudopapillary Neoplasms of the Pancreas: Results of a Nationwide Study of Risk Factors and Treatment Modalities

BACKGROUND

Solid pseudopapillary neoplasms of the pancreas (SPPN) can relapse very late, but little is known about risk factors for recurrence and optimal treatment. We aimed to identify risk factors for recurrence and to analyze treatment modalities in all French pediatric cases of SPPN over the past 20 years.

MATERIAL AND METHODS

Data were collected from pediatric oncologists and surgeons, and also from adult pancreatic surgeons in order to identify late recurrences.

RESULTS

Fifty-one patients (41 girls) were identified. Median age at diagnosis was 13.1 years [8.7-17.9]. Abdominal pain was the commonest presenting symptom (32/49, 65%). The tumor was located in the pancreatic head in 24 patients (47%). Preoperative biopsy or cytology was performed in 14 cases (28%). All patients were operated with a median of 23 days [0-163] after diagnosis. The rate of postoperative morbidity was 29%. With a median follow-up of 65 months [0.3-221], the overall and event-free survival was 100% and 71%, respectively. Seven patients (13.7%) relapsed with a median of 43 months [33-94] after initial surgery. Six were treated surgically, either alone (n = 3) or with perioperative chemotherapy (n = 2) or hyperthermic intraperitoneal chemotherapy (n = 1). One patient in whom further treatment was not feasible was still alive at last news. Risk factors for recurrence were positive surgical margins (P = 0.03) and age less than 13.5 years at diagnosis (P = 0.03).

CONCLUSIONS

SPPN recurrence in this pediatric series was a rare and late event that did not undermine overall survival. Complete surgical removal of recurrent tumors appears to be the best option.

Pancreatic surgery for tumors in children and adolescents

PURPOSE

Pancreatic neoplasms are uncommon in children. This study sought to analyze the clinical and pathological features of surgically resected pancreatic tumors in children and discuss management strategies.

METHODS

We conducted a retrospective review of patients ≤21 years with pancreatic neoplasms who underwent surgery at a single institution between 1995 and 2015.

RESULTS

Nineteen patients were identified with a median age at operation of 16.6 years (IQR 13.5-18.9). The most common histology was solid pseudopapillary neoplasm (SPN) (n = 13), followed by pancreatic neuroendocrine tumor (n = 3), serous cystadenoma (n = 2) and pancreatoblastoma (n = 1). Operative procedures included formal pancreatectomy (n = 17), enucleation (n = 1) and central pancreatectomy (n = 1). SPNs were noninvasive in all but one case with perineural, vascular and lymph node involvement. Seventeen patients (89.5 %) are currently alive and disease free at a median follow-up of 5.7 (IQR 3.7-10.9) years. Two patients died: one with metastatic insulinoma and another with SPN who developed peritoneal carcinomatosis secondary to a concurrent rectal adenocarcinoma.

CONCLUSIONS

Pediatric pancreatic tumors are a heterogeneous group of neoplastic lesions for which surgery can be curative. SPN is the most common histology, is characterized by low malignant potential and in selected cases can be safely and effectively treated with a tissue-sparing resection and minimally invasive approach.

Acute Pancreatitis in Pediatric Patients: Demographics, Etiology, and Diagnostic Imaging

OBJECTIVE

The objective of this article is to provide updates on acute pancreatitis in children regarding the imaging findings, causes, and complications based on a review of the current studies in the pediatrics literature. We discuss the epidemiology of acute pancreatitis, the role of imaging and imaging findings in the diagnosis of acute pancreatitis, and the causes and complications of acute pancreatitis.

CONCLUSION

The incidence of acute pancreatitis is increasing in children. Imaging plays an important role in the diagnosis of acute pancreatitis because imaging findings can be used to establish the cause of acute pancreatitis, evaluate for complications of acute pancreatitis, and possibly predict the course of the disease.

Pancreatic tumours in children: diagnosis, treatment and outcome

PURPOSE

Pancreatic tumours in children are exceedingly rare and as a result constitute a diagnostic and therapeutic challenge to paediatric surgeons. We reviewed our experience with these rare entities.

METHODS

Retrospective single institution study on all paediatric pancreatic tumours over a period of 38 years (1973-2011) and literature review. We recorded data relating to the clinical features at presentation, diagnostic evaluation, treatment and outcome.

RESULTS

Fourteen patients were identified (eight male). The most common symptoms at presentation were abdominal pain, anorexia and vomiting. Two cases were discovered incidentally. There were 12 primary and 2 metastatic tumours. Tumour types were solid pseudopapillary neoplasm (n = 6), insulinoma (n = 3), pancreatoblastoma (n = 1), congenital pancreatic cyst (n = 1), Burkitt lymphoma of the pancreas (n = 1) and metastatic lesions of other primary tumours (n = 2). Twelve were treated with surgical resection including 2 laparoscopically. Post-surgical complications included acute pancreatitis (n = 2) and pancreatic pseudocyst (n = 2). There was one death from a metastatic tumour and treatment is ongoing in one patient. The remainder has survived.

CONCLUSION

Paediatric pancreatic tumours are rare entities and are usually benign. Clinical symptoms are often non-specific and presentation may be late due to tumour inactivity in case of endocrine neoplasms. For most tumours, surgical resection is the optimal treatment which may be successfully performed laparoscopically when the lesion is in the body or tail of the pancreas. Long-term outcome is generally good.

Solid-pseudopapillary neoplasm of the pancreas in children: can we predict malignancy?

PURPOSE

We aimed to review clinical and histologic findings of solid-pseudopapillary neoplasm (SPN) in children and determine the predictive factor of the malignancy.

METHOD

The records of 45 patients (9 males, 36 females) who underwent surgery for SPN in the Asan Medical Center from 1992 to 2012 were retrospectively analyzed. We analyzed the factors between histologic benign group (n=36) and malignant group (n=9).

RESULTS

The mean age of children was 14.9±3.15years (range 9-20years). Mean size of the tumor was 6.36±3.61cm, and most common site in the pancreas was the tail (n=23). Three patients had distant metastasis at initial diagnosis. The sites were the liver (n=2) and the omentum (n=1). All patients underwent complete resection, and the median follow up period was 34months. Recurrence (n=4) was more common in the malignant group (p<0.05). We calculated the proportion of solid component by manual volumetry with a CT scan. The median value was 41.5% in benign group and 88.4% in malignant group. On comparative analysis, the proportion of solid component was found to have significant association with malignancy (p<0.05).

CONCLUSION

Histologic malignant SPN has high risk of recurrence. We should consider more radical resection when finding a predominantly solid tumor in a CT scan.

Imaging features of primary malignant pancreatic tumors in children

OBJECTIVE

The purpose of this article is to describe the sonographic, CT, and MRI features of primary malignant pancreatic tumors of childhood.

CONCLUSION

Most children with a pancreatic tumor present with a solid pseudopapillary tumor that is usually well marginated and has solid and cystic areas surrounded by a fibrous capsule. Pancreatoblastoma is more aggressive than solid pseudopapillary tumor. The imaging features are those of a large heterogeneous tumor. Ductal adenocarcinoma is rare in children and has a poor prognosis.

Imaging of pediatric pancreatic neoplasms with radiologic-histopathologic correlation

OBJECTIVE

The purpose of this article is to describe the imaging features of pediatric pancreatic tumors with pathologic correlation. Epithelial and nonepithelial lesions are described. Pancreatic imaging protocols, clinical presentation, and management are also detailed.

CONCLUSION

Pancreatic neoplasms are rare in children and vary widely between benign and malignant causes and between cystic and solid lesions. Epithelial tumors are most common and include solid pseudopapillary tumor, pancreatoblastoma, islet cell neoplasms, and cystic lesions.

Solid pseudopapillary tumour (Frantz's tumour) of the pancreas in childhood

An 11-year-old girl presented with acute pancreatitis and mass in the head of the pancreas. MRI revealed a heterogeneous right-upper quadrant retroperitoneal mass measuring 6.8×6.1×5.5 cm arising from the pancreatic head. Endoscopic ultrasound with fine-needle aspirate revealed a solid pseudopapillary tumour (SPT) of the pancreas. The patient underwent a pylorus-preserving Whipple procedure. Pathology confirmed SPT. First described by Frantz, SPT represents less than 3% of all exocrine tumours. It is especially rare in children and shows different clinical features compared with adults. In our patient, tumour cells were arranged at the periphery of fibrovascular cores, but they did not show definite gland formation, keratinisation or cytoplasmic pigment accumulation. A periodic acid-Schiff stain without diastase did not show appreciable glycogen within the tumour cells, classic for Frantz's tumour. The literature, diagnosis, management and pathogenesis on this rare entity in children are reviewed and discussed.

Clinical presentation and comparison of surgical outcome for segmental resection vs. Whipple's procedure for solid pseudopapillary tumor: Report of six new cases & literature review of 321 cases

AIM

Report 6 new cases of solid-pseudopapillary-pancreatic-tumor, comprehensively review 321 cases reported in American literature, and compare outcomes for segmental resection vs.. Whipple's procedure.

METHODS

Cases of solid-pseudopapillary-tumor at William Beaumont Hospital, 1999-2011, identified by computerized analysis of pathology reports. Comprehensive review of all American cases identified by computerized literature review. Segmental resection includes open/laparoscopic central pancreatectomy and anatomic distal pancreatectomy, but excludes enucleation.

RESULTS

Six cases of solid-pseudopapillary-pancreatic-tumors (0.5% of all solid pancreatic lesions), occurred during 1999-2011 at the hospital. Mean age at diagnosis = 27.7 years. All 6 were female. All patients had abdominal pain. Mean symptom duration = 10.0 days. All patients had normal routine blood tests. Mean APACHE II score at diagnosis = 1.8. All six patients had single heterogeneous lesions, with cystic/solid components. All patients underwent surgery: segmental resection-4, Whipple's procedure-2. Tumors were uniformly diagnosed by surgically resected tissue. Mean tumor size = 5.7 cm. Mean postoperative length of stay = 4.0 days for segmental resection (N = 4) vs. 14.0 days for Whipple's procedure (N = 2). All 6 patients are alive and well to-date, without evident local recurrence or metastasis. In a literature review, 45 patients undergoing Whipple's procedure versus 34 patients undergoing segmental resection, had significantly longer mean postoperative hospitalization (16.4 vs. 4.3 days, p = 0.01), and had increased unadjusted mortality (20.2% vs. 2.2%, p = 0.018). However, this mortality difference became insignificant when adjusting for longer mean follow-up of Whipple's procedure patients (Kaplan-Meier-survival-curve, p = 0.75).

CONCLUSIONS

This work suggests segmental resection of these pancreatic tumors localized to the body/tail may have a better surgical outcome than Whipple's procedure for tumors localized to the pancreatic head. Further studies are necessary.

Imaging features of pancreatic tumors in children: 13-year experience at a pediatric tertiary hospital

BACKGROUND

Pancreatic tumors are rare in children, resulting in limited information regarding their frequency and imaging appearances.

OBJECTIVE

To review all pancreatic tumors seen in children over a decade at a large tertiary pediatric institution and to describe multimodality imaging findings.

MATERIALS AND METHODS

We conducted a retrospective review of imaging studies performed in children with pancreatic tumors between January 2000 and December 2012, analyzing imaging features on available US, CT and MR examinations. We reviewed patient charts for clinical features, management and final diagnosis.

RESULTS

We included 23 children in this study. Of these, 12 had solid and papillary epithelial neoplasms (SPEN), 3 had neuroendocrine tumors, 3 had lymphoma, and 1 each had hemangioendothelioma, benign congenital cysts with adipose tissue, dendritic cell sarcoma, metastatic rhabdomyosarcoma, and lipoma. All children with SPEN were teenage girls. SPEN showed characteristic imaging features including well-defined margins with surrounding capsule, solid-cystic components and hemorrhage.

CONCLUSION

Pancreatic tumors are uncommon in children. SPEN is the most common tumor and is seen predominantly in teenage girls and shows characteristic imaging features.

Usefulness of 18F-FDG PET/CT in an unusual case of solid-pseudopapillary pancreatic tumor in childhood with aggressive behavior

We report an unusual case of a solid-pseudopapillary pancreatic tumor (SPPT) with aggressive behavior that occurred in a 16-year-old male patient. ¹⁸F fluorodeoxyglucose PET/CT showed increased radiopharmaceutical uptake in a solid mass of the body of the pancreas, in several liver lesions, and in multiple peritoneal implants, corresponding to an SPPT with liver and peritoneal metastases, respectively. Based on PET/CT findings, the patient was referred to chemotherapy. In this unusual case of pediatric SPPT with aggressive behavior, ¹⁸F fluorodeoxyglucose PET/CT has been useful in staging the disease and in treatment planning.

Primary malignant pancreatic neoplasms in children and adolescents: a 20 year experience

BACKGROUND

Malignant pancreatic neoplasms in children and adolescents are rare. The clinical presentation, pathologic characteristics, management, and outcomes at two institutions are discussed.

METHODS

We retrospectively reviewed all pediatric patients (age <= 18 years) treated for malignant pancreatic neoplasms at two institutions between 1991 and 2011.

RESULTS

Thirty-one patients were identified with median age of 14.7 years (4-18 years). The most common histology was solid pseudopapillary tumor (SPT) (n=22, 71%) followed by neuroendocrine tumors (n=4, 13%), pancreatoblastoma (n=4, 13%), and one unclassified spindle cell neoplasm (3%). Most patients presented with abdominal pain (n=22, 71%). Complications included pancreatic leak, pseudocyst formation, pancreatitis, pancreatic insufficiency, and small bowel obstruction. The overall 1- and 5-year survival was 96% (95% CI 74%-99%) and 78% (95% CI 43%-93%). Median follow-up among patients alive at the end of follow-up was 20 months (<1 month-16.2 years). Patients with SPT had better overall survival compared to patients with neuroendocrine tumors or pancreatoblastomas (Log-rank; p=0.0143).

CONCLUSION

The majority of pediatric and adolescent patients present with SPTs which are usually resectable and associated with an excellent prognosis. Other histologic subtypes more often present with distant metastases and portend a worse prognosis.

Lymphoepithelial cyst of the pancreas in female children--report of two cases

Lymphoepithelial cyst (LEC) of the pancreas is almost always reported as a case report or in small series mostly in male adult patients with vague clinical manifestations and difficult pre-operative diagnosis. Between the years 2007 and 2012, two female children with LEC of the pancreas were operated on at the Children's Surgical Unit of Murtala Mohammad Specialist Hospital, Kano in northern Nigeria. Satisfactory outcomes were achieved after distal pancreatectomy and splenectomy in one and a Whipple procedure in the other. This benign lesion of the pancreas should be considered in the differential diagnosis of cystic lesions of the pancreas in children.

Diagnosis of autoimmune pancreatitis vs neoplasms in children with pancreatic mass and biliary obstruction

Autoimmune pancreatitis (AIP) is a rare autoimmune disorder that resembles pancreatic neoplasia and occurs primarily in adults. Management strategies and diagnostic criteria are being revised for adult patients; there are no clear diagnostic criteria for pediatric patients. We describe 3 cases of AIP in children, on the basis of clinical and pathology records. We also performed a literature review to determine the incidence of biliary obstruction in pediatric patients with pancreatic tumors. We found that children with AIP present with a variety of symptoms, and that diagnostic and therapeutic strategies also vary. Furthermore, on the basis of the many studies published on pediatric patients with pancreatic tumors, only a small percentage of the patients have biliary obstructions. Cytologic analysis of samples collected by fine-needle aspiration cytology does not accurately identify AIP in children. However, frozen section needle core biopsy samples can be used to distinguish children with AIP from those with neoplasia. Children with pancreatic mass and biliary obstruction are more likely to have AIP than neoplasms.

Solid pseudopapillary tumour of the pancreas in children: clinical and computed tomography manifestation

PURPOSE

The purpose of our study was to retrospectively assess imaging features of computed tomography (CT) and clinical characteristics of children with solid pseudopapillary tumours (SPTs) of the pancreas in comparison with those of SPTs in adults.

MATERIALS AND METHODS

CT images and clinical data of 86 patients with histopathologically proven SPTs were reviewed. Eighteen patients were classified as children (≤18 years old), and 68 were classified as adults (>18 years old) according to age at diagnosis. Statistical analysis was performed using the χ (2) test and the Student's t test.

RESULTS

Eighteen patients (15 girls and three boys) were children, with an average age of 15.1 years at operation. Abdominal pain or discomfort was the most common manifestation in children (66.7%). Mean tumour size in children was significantly larger than in adults (9.1 vs. 5.7 cm; p=0.001). Except for tumour size, no significant statistical difference was observed in clinical factors or imaging features between SPTs in children and adults.

CONCLUSIONS

Ours is the largest single-centre study to demonstrate the features of pancreatic SPT in children. SPT diagnosis should always be considered when a large pancreatic mass with typical imaging is found in a child, especially in adolescent girls.

Solid pseudopapillary tumor of the pancreas: a single-institution 20-year series of pediatric patients

PURPOSE

Solid pseudopapillary tumor (SPT) of the pancreas is a rare neoplasm. The objective of this study was to review our institution's experience and provide an update on current management in the pediatric population.

METHODS

Our pathology database identified all patients with SPT for a 20-year period (1991-2011). Demographics, clinical characteristics, operative details, pathology, and outcomes data were retrospectively reviewed.

RESULTS

Eleven patients with SPT were identified. Most were female and Hispanic. Median age at resection was 14 years (9-17 years). Most patients presented with abdominal pain. Diagnostic imaging was most commonly an ultrasound or computed tomography. All tumors were resected en bloc. Median greatest tumor diameter was 5 cm (3.5-12 cm). Median length of stay was 8 days (5-19 days). Complications included pancreatic leak, chyle leak, delayed gastric emptying, fat malabsorption, and incisional keloid. Recurrence developed after 2.5 years in 1 patient with positive surgical margins. There were no metastases or deaths. Median follow-up was 1.4 years (0.6-5.9 years).

CONCLUSION

This pediatric series of SPT from a single institution corroborates previous reports in the literature. In our experience, SPT behaves like a low-grade malignancy and has an excellent prognosis. Surgical resection is dictated by tumor location and remains the treatment of choice.

Well-differentiated pancreatic neuroendocrine carcinoma in tuberous sclerosis--case report and review of the literature

Neuroendocrine tumors of the pancreas are rare in children. They usually occur in the setting of genetic syndromes such as multiple endocrine neoplasia type 1, von Hippel-Lindau disease, and neurofibromatosis 1. These tumors have also been reported in the tuberous sclerosis complex (TSC), but the incidence is low in comparison with other syndromes. Only 9 cases have been described to date, and it is not yet well understood if any connection exists between TSC and pancreatic endocrine tumors. TSC is characterized by mutations in TSC1 and TSC2 genes, which activate the AKT-mTOR oncogenic cascade. Recent molecular studies in pancreatic endocrine tumors showed activation of the same pathway, which points toward a common molecular pathway between these two entities. We present a case of well-differentiated neuroendocrine carcinoma of the pancreas in a child with TSC and discuss the genetic aspects of this disease.

Gastrointestinal tumors in children

Although tumors arising from the spleen, pancreas, and gastrointestinal tract in the pediatric population are relatively uncommon, imaging plays an important role in diagnosis, staging, and treatment planning. Initial imaging with abdominal radiograph contributes to the evaluation for intestinal obstruction, constipation, and mass effect, and sometimes may reveal areas of calcification.

Obstructive jaundice secondary to pancreatic head adenocarcinoma in a young teenage boy: a case report

INTRODUCTION

Pancreatic adenocarcinoma is extremely rare in childhood. We report a case of metastatic pancreatic adenocarcinoma in a 13-year-old boy, revealed by jaundice.

CASE PRESENTATION

A 13-year-old Moroccan boy was admitted with obstructive jaundice to the children's Hospital of Rabat, Department of Pediatric Oncology. Laboratory study results showed a high level of total and conjugated bilirubin. Computerized tomography of the abdomen showed a dilatation of the intra-hepatic and extra-hepatic bile ducts with a tissular heterogeneous tumor of the head of the pancreas and five hepatic lesions. Biopsy of a liver lesion was performed, and a histopathological examination of the sample confirmed the diagnosis of metastatic ductal adenocarcinoma of the pancreas. Our patient underwent a palliative biliary derivation. After that, chemotherapy was administered (5-fluorouracil and epirubicin), however no significant response to treatment was noted and our patient died six months after diagnosis.

CONCLUSION

Malignant pancreatic tumors, especially ductal carcinomas, are exceedingly rare in the pediatric age group and their clinical features and treatment usually go unappreciated by most pediatric oncologists and surgeons.

Surgical treatment of pancreatic tumors in childhood and adolescence: uncommon neoplasms with favorable outcome

BACKGROUND/AIMS

Pancreatic tumors in children and adolescents are uncommon. The aim of the present paper was to analyze short- and long-term outcomes after surgical treatment of primary pancreatic neoplasms in children and adolescents at a single high-volume center for pancreatic diseases.

METHODS

Retrospective review of medical records and pathology reports of patients younger than 18 years who underwent surgery at Verona University Hospital from 1990 through 2010.

RESULTS

The study population consisted of 20 patients. Abdominal pain and palpable mass were the most common presenting symptoms. No patient had a locally advanced, unresectable or metastatic disease. Complete resection (R0) was achieved in 19 patients. There was no postoperative mortality, but postoperative complications occurred in 5 cases (25%). Histological examination showed 12 solid pseudopapillary tumors, 5 neuroendocrine tumors, 2 cystadenomas and 1 epithelial malignant tumor. At a median follow-up of 49.5 months (range: 7-234), there was no tumor recurrence. Postoperative diabetes was diagnosed in 1 patient and 4 other patients developed pancreatic exocrine insufficiency.

CONCLUSION

In the setting of a high-volume surgical center, radical resection of pancreatic tumors in children and adolescents is associated with acceptable postoperative morbidity and favorable long-term outcome.