Multidetector-row computed tomography findings of sclerosing mesenteritis with associated diseases and its prevalence

Association between mesenteric panniculitis and urolithiasis

BACKGROUND

Mesenteric panniculitis is a rare condition and refers to benign and nonspecific inflammation of mesenteric fat.

OBJECTIVES

This study aimed to evaluate the hypothesis of a greater prevalence of mesenteric panniculitis in patients with urolithiasis.

MATERIALS AND METHODS

In this cross-sectional study, abdominopelvic CT scans of 500 patients were reviewed for the presence of urolithiasis and mesenteric panniculitis. The inclusion criteria were patients who were referred with acute abdominal pain and were suspected of having urolithiasis or other urinary conditions and who had undergone abdominopelvic CT scan. Subcutaneous fat thickness was measured, and pain intensity was recorded by patient evaluation.

RESULTS

Mesenteric panniculitis was found in 10 patients, all of whom (100%) had urinary stones (ureter or kidney or both), and none of them had previous surgeries or known malignancies. The prevalence of panniculitis was significantly greater in the group with urolithiasis. In the urolithiasis group, subcutaneous fat thickness was greater in patients with panniculitis, although the difference was not statistically significant. In the subgroup analysis, pain intensity was not significantly greater in patients with panniculitis.

CONCLUSION

Mesenteric panniculitis is more prevalent among patients with urolithiasis, but it seems that it does not change the intensity of the pain.

CT features associated with underlying malignancy in patients with diagnosed mesenteric panniculitis: Mesenteric panniculitis: CT features associated with underlying malignancy

PURPOSE

The purpose of this study was to identify abdominal computed tomography (CT) features associated with underlying malignancy in patients with mesenteric panniculitis (MP).

MATERIALS AND METHODS

This single-institution retrospective longitudinal cohort study included patients with MP and a minimum 1-year abdominopelvic CT follow-up or 2-year clinical follow-up after initial abdominopelvic CT examination. Two radiologists, blinded to patients' medical records, conjointly reviewed CT-based features of MP. Electronic medical records were reviewed for newly diagnosed malignancies with the following specific details: type (lymphoproliferative disease or solid malignancy), location (possible mesenteric drainage or distant), stage, time to diagnosis. An expert panel of three radiologists and one hemato-oncologist, who were blinded to the initial CT-based MP features, assessed the probability of association between MP and malignancy based on the malignancy characteristics.

RESULTS

From 2006 to 2016, 444 patients with MP were included. There were 272 men and 172 women, with a median age of 64 years (age range: 25-89); the median overall follow-up was 36 months (IQR: 22, 60; range: 12-170). A total of 34 (8%) patients had a diagnosis of a new malignancy; 5 (1%) were considered possibly related to the MP, all being low-grade B-cell non-Hodgkin lymphomas. CT features associated with the presence of an underlying malignancy were the presence of an MP soft-tissue nodule with a short axis >10 mm (P < 0.0001) or lymphadenopathy in another abdominopelvic region (P < 0.0001). Associating these two features resulted in high diagnostic performance (sensitivity 100%; [95% CI: 57-100]; specificity 99% [95% CI: 98-100]). All related malignancies were identified.

CONCLUSION

Further workup to rule out an underlying malignancy is only necessary in the presence of an MP soft-tissue nodule >10 mm or associated abdominopelvic lymphadenopathy.

Mesenteric panniculitis does not confer an increased risk for cancers: A systematic review and meta-analysis

BACKGROUND

Mesenteric panniculitis (MP) is a non-specific, localized inflammation at the mesentery of small intestines which often gets detected on computed tomography. An association with malignant neoplasms remains unclear. We performed a systematic review and meta-analysis to examine the association of malignancy with MP.

METHODS

MEDLINE, EMBASE, Web of Science, and Cochrane databases were searched for articles published from inception to 2020 that evaluated the association of malignant neoplasms with MP in comparison with control groups. Using random-effects method, a summary odds ratio (OR) estimate with 95% confidence intervals for malignant neoplasms in MP was estimated.

RESULTS

Four case-control studies reporting data on 415 MP patients against 1132 matched-controls met inclusion criteria and were analyzed. The pooled OR for finding a malignant neoplasm in patients with MP was 0.907 (95% CI: 0.688-1.196; P = .489). The heterogeneity was mild and non-significant. Also, there was no heightened risk of any specific type of malignancy with MP. Three more case-series with unmatched-control groups (MP: 282, unmatched-controls: 17,691) were included in a separate analysis where the pooled OR of finding a malignant neoplasm was 2.963 (95% CI: 1.434-6.121; P = .003). There was substantial heterogeneity in this group.

CONCLUSION

This meta-analysis of matched controlled studies proves absence of any significant association of malignant neoplasms with MP. Our study also demonstrates that the putative association of malignancy with MP is mainly driven by uncontrolled studies or case-series.

A case of immunoglobulin G4-related sclerosing mesenteritis without other organ involvement

A 64-year-old man presented to our hospital with abdominal pain and 4-5 episodes of watery diarrhea per day for 2 months. Abdominal ultrasound examination revealed a mass in the peritoneal cavity, and computed tomography showed a 13.4 cm mass in the mesentery and a 3 cm mass in the mesocolon. The patient underwent laparoscopic partial resection for diagnosis. Microscopically, abundant fibrosis and numerous immunoglobulin (Ig) G4-positive plasma cells were observed. The serum level of IgG4 was 665 mg/dl postoperatively. These findings suggested that the lesion was consistent with IgG4-related sclerosing mesenteritis. Oral steroids resulted in rapid disappearance of symptoms and a decrease in masses. Recently, sclerosing mesenteritis are reported as IgG4-related disease or mimicking IgG4-related disease but multiple lesions rarely occur in the same organ. We report a case of IgG4-related sclerosing mesenteritis with multiple lesions without involvement of other organs, such as the pancreas and salivary glands.

The Use of Glucocorticoids for Better Control of Diabetes Mellitus: The Paradox of Sclerosing Mesenteritis (The Rare Could Become Common)

Patient: Male, 57-year-old

Final Diagnosis: Sclerosing mesenteritis

Symptoms: Abdominal pain

Medication: Prednisone

Clinical Procedure: CT scan • MRI

Specialty: Endocrinology and Metabolic

Association between mesenteric panniculitis and non-neoplastic disorders

PURPOSE

To assess the relationship between MP and coexisting non-neoplastic disorders.

METHODS

Consecutive abdominal computed tomography (CT) scans of 4674 patients were evaluated retrospectively for CT features of MP between January 2017 and January 2018. Clinical findings of patients were analyzed. Four control patients were selected from our cohort for each MP patient such that they matched for age, gender and CT protocol. Statistical analysis was performed using a t, Mann-Whitney U, χ², or Fisher's test.

RESULTS

976 patients were excluded from the study due to the exclusion criteria and finally, 102/3698 patients were diagnosed with MP (mean age = 57.2 ± 12.5 years, 52% male). On CT, a hyperattenuated fatty mass (120/120), subcentimeter lymph nodes (117/120), congregation of mesenteric vessels (82/120) within the mass, a fat halo sign (28/120) and a pseudocapsule (88/120) were seen at the mesentery.The intra-observer agreement was almost perfect for the fatty mass and lymph nodes and moderate or substantial for other CT features (p < 0.001). The most prominent disorders were metabolic syndrome (MetS) and urogenital diseases in MP (45%, 37%, respectively) and control groups (31%, 26%, respectively). Between groups, no significant differences were found in the history of abdominal surgery, gastrointestinal and autoimmune diseases (p-value range 0.064-0.663); however, significant differences were found in the rates of vascular, urogenital diseases and MetS (p-value range 0.012-0.036).

CONCLUSION

MetS and urolithiasis were significantly more common in patients with MP than in those without MP. Therefore, there may be a clinically relevant association between these disorders. MetS may be a risk factor for MP and urolithiasis, and treatment of metabolic disorders should be undertaken to prevent these diseases.

The Complex Relationship between Mesenteric Panniculitis and Malignancy - A Holistic Approach is Still Needed to Understand the Diagnostic Uncertainties

Mesenteric panniculitis is an idiopathic, localized inflammation involving the adipose tissue of the small bowel mesentery. The association of mesenteric panniculitis with malignancy, predominantly lymphomas, has been widely reported in the medical literature. In this review article, we will discuss the clinical guidelines in the diagnosis and management of mesenteric panniculitis and the clinical association between mesenteric panniculitis and malignancies.

Demystifying the mesenteric root lesions

OBJECTIVE

The aim of this article is to describe the normal anatomy of the root of the small bowel mesentery (RSBM) as well as the multidetector computed tomography (MDCT) features of the various primary and secondary lesions that affect the RSBM.

RESULTS

The small bowel mesentery attaches the jejunum and ileum to the posterior abdominal wall, the line of attachment forming the RSBM. Several primary as well as secondary lesions involve the RSBM. The RSBM has anatomical contiguity with the mesocolon and other peritoneal ligaments, which forms a route for the spread of infection, neoplasms as well as several other abdominal pathologies. MDCT plays an important role in the evaluation of mesenteric root lesions.

CONCLUSION

Familiarity with the lesions involving the RSBM and their characteristic appearances on MDCT is important in giving thoughtful differential diagnosis and guiding the treating physician in further management.

Sclerosing Mesenteritis

Sclerosing mesenteritis is a rare non-neoplastic disorder characterized by fat necrosis, chronic inflammation, and fibrosis typically of the small bowel mesentery. Our understanding of this disorder is limited by its rarity as well as inconsistent terminology used across the literature. While prior abdominal surgery or trauma, autoimmunity, infection, ischemia, and malignancy have been suggested to be involved in the pathogenesis of the disorder, it remains poorly understood. The clinical course of sclerosing mesenteritis is generally benign with a large proportion of patients diagnosed incidentally on imaging obtained for other indications. In a subset of patients, symptoms may arise from a mass effect on the bowel, lymphatics, or vasculature resulting in bowel obstruction, chylous ascites, or mesenteric ischemia. Symptomatic patients should be treated with a combination of corticosteroid and tamoxifen as first-line therapy based on retrospective case series and experience in other fibrosing disorders. Surgical intervention may be required in those with persistent obstruction despite conservative treatment, though complete resection of the mass is often not feasible given intimate involvement with the mesenteric vasculature. A careful use of terminology and communication between the radiologist, pathologist, and clinicians in the care of these patients will be essential to future efforts at understanding this disease.

Malignant masquerade sclerosing mesenteritis: A case report and review

Mesenteric panniculitis (MP), also known as sclerosing mesenteritis (SM), retractile mesenteritis or mesenteric lipodystrophy, is a rarely diagnosed inflammatory condition of unknown etiology that involves the mesenteric adipose tissue. We are presenting a case of sclerosing mesenteritis which presented us with features suggestive of malignant lesion and turned out to be benign one. An elderly gentleman of 68 years male presented to us with history of nonprogressive pain abdomen since 2 months associated with low grade fever and on and off constipation. On evaluation with CECT he was found to have mesenteric mass probably malignant. PET/CT showed an FDG avid lesion suggestive of malignancy, requiring surgery. He underwent radical excision of mesentery with resection of corresponding bowel. Final histopathology report showed poorly defined lesion comprised of nodular, poorly defined proliferation of bland looking fibroblast like cells, which at places are lying in fascicles, in a background of dense fibrosis and mature fat cells, with prominent focal lymphocytic infiltrate, at place forming reactive follicles, suggestive of sclerosing mesenteritis. Now patient is on follow up for further therapy.

Sclerosing mesenteritis: a comprehensive clinical review

Sclerosing mesenteritis is a rare disease entity initially described in 1924 with a prevalence reported to be less than 1%. Sclerosing mesenteritis is a comprehensive term used to describe three almost similar clinical entities including mesenteric panniculitis, retractile mesenteritis, and mesenteric lipodystrophy which only differ by their histology. The etiology of sclerosing mesenteritis is uncertain, but the disease has been associated with trauma, autoimmune disease, surgery, and malignancy. The typical presenting symptom is the abdominal pain, but sclerosing mesenteritis has a broad constellation of presenting symptoms which often makes consideration of the diagnosis unlikely. Treatment for this little-understood disease ranges from surgical intervention for patients presenting with obstructive symptoms to immunosuppressive medical therapy for patients presenting with pain. The purpose of this article is to provide an overview of the literature relevant to the diagnosis, etiology, and management of this condition in hopes of making physicians aware of this unique condition.

Is there an association between mesenteric panniculitis and lymphoma? A case control analysis

AIM

To determine the prevalence and association of mesenteric panniculitis (MP) in a group of patients with non-Hodgkin's lymphoma (NHL) compared to control group.

MATERIALS AND METHODS

We retrospectively evaluated computed tomography (CT) and combined positron-emission tomography (PET) with CT examinations of a total of 166 patients who were diagnosed with NHL over a period of 5 years (2008-2013). The control group consisted of 332 subjects who were matched for gender and age at the time period the examinations were performed on the study group. A combination of radiological signs and absence of 2-[¹⁸F]-fluoro-2-deoxy-d-glucose (FDG)-uptake was used to establish the diagnosis of MP and distinguish it from the involvement of mesentery by lymphoma.

RESULTS

MP was identified in three patients (prevalence 1.8%) from the study group as compared to seven subjects out of 332 (2.1%) in the control group (p=0.556). During the course of follow-up no changes in the imaging features of MP were seen in either group. Additionally, 27 (16.2%) patients from the study group were found to have changes in the mesentery, which were attributed to the involvement of the mesentery in the primary disease.

CONCLUSION

The prevalence of MP among patients with NHL was found to be 1.8%, which corresponds to the range of its prevalence in the general population. This is contrary to the proposition that MP is associated with NHL.

Mesenteric panniculitis: review of consecutive abdominal MDCT examinations with a matched-pair analysis

Background The relationship between mesenteric panniculitis (MP), a benign condition involving adipose mesenteric tissue, and malignancy is still being questioned. Purpose To investigate the prevalence of MP and study its relationship with malignancy. To investigate the 5-year outcome of MP patients for the development of malignancy. Material and Methods Retrospective search for MP reviewing 3054 consecutive multidetector row computed tomography (MDCT) scans. Two radiologists in consensus selected the final MP population. For each MP, two subsequent MDCT scans of patients matched by gender and age. Five-year follow-up data regarding cancer occurrence after index MDCT scans were obtained for the MP and control groups. Comparisons between groups were performed using univariate conditional logistic regression. Results A total of 160 patients had at least three of the five MDCT features defining MP. Sixty-four were excluded owing to disease causing mesenteric infiltration or contiguous neoplastic involvement. The final population included 96 MP and 192 control patients. The prevalence of MP was 3.14%. Most cases of MP were discrete (66.7%), 2.1% were marked. In total, 60.4% and 59.4% of MP and control patients, respectively, had cancer ( P = 0.86). There was no significant association between MP score and presence of cancer ( P = 0.06) nor any relationship between the course of associated cancer and MP evolution. In total, 80/96 MP patients and 50/78 control patients without associated cancer had a 5-year follow-up at least. No significant difference between both groups for new tumor occurrence during follow-up was found ( P = 0.15). Conclusion Our results do not suggest that patients with incidentally found MP should be followed up for early detection of a cancer.

Treatment options for spontaneous and postoperative sclerosing mesenteritis

Sclerosing mesenteritis is a rare pathology with only a few described cases in the literature. The etiology is unclear; however, several potential triggers, including abdominal surgery and abdominal trauma, have been discussed. The pathology includes a benign acute or chronic inflammatory process affecting the adipose tissue of the mesenterium. Despite it being a rare disease, sclerosing mesenteritis is an important differential diagnosis in patients after abdominal surgery or patients presenting spontaneously with signs of acute inflammation and abdominal pain. We present here three cases with sclerosing mesenteritis. In two cases, sclerosing mesenteritis occurred postoperatively after abdominal surgery. One patient was treated because of abdominal pain and specific radiological signs revealing spontaneous manifestation of sclerosing mesenteritis. So far there are no distinct treatment algorithms, so the patients were treated differently, including steroids, antibiotics and watchful waiting. In addition, we reviewed the current literature on treatment options for this rare disease.

Progressing Sclerosing Mesenteritis (Mesenteric Panniculitis) Mimics Progression of Malignancy After Neoadjuvant Chemotherapy for Gastric Adenocarcinoma on Serial 18F-FDG PET/CT

A 62-year-old man was diagnosed with a moderately differentiated gastric adenocarcinoma in the proximal stomach. A staging 18F-FDG PET/CT showed an intensely FDG-avid gastric mass, as well as a mildly FDG-avid misty nodular mesentery. After 3 cycles of neoadjuvant chemotherapy, a follow-up PET/CT showed partial response of the gastric primary, with increase in the size of nodules in the mesentery and increased FDG uptake, raising concern of secondary malignancy. Biopsy of the mesentery revealed xanthogranulomatous inflammation, consistent with sclerosing mesenteritis.

[Mesenteric panniculitis]

Mesenteric panniculitis is a condition characterized by chronic nonspecific inflammation of the mesentery. There is little and often confusing information about its characteristics and the approach to take once it has been demonstrated by an imaging test. We propose to describe the epidemiological, clinical, laboratory, radiological and pathological features of the patients with mesenteric panniculitis reported in the literature, as well as possible disorders causal or associated with mesenteric panniculitis, in the opinion of the authors of each study. Finally, we will review the different therapeutic options used and the response to them. To that end a literature search was performed from the main medical databases selecting ítems with information on these aspects. This information was collected on a database stored in SPSS software for further analysis and summary.

Mesenteric panniculitis: systematic review of cross-sectional imaging findings and risk of subsequent malignancy

Objectives

Systematic review to determine any association between imaging features of idiopathic mesenteric panniculitis (MP) and subsequent malignancy.

Methods

Two researchers searched primary literature independently for imaging studies of MP. They extracted data focusing on methodology for unbiased patient accrual and capability to determine a link between MP and subsequent malignancy. They noted imaging features of MP. Data were accrued and meta-analysis intended.

Results

Fourteen of 675 articles were eligible; 1,226 patients. Only three (21 %) accrued patients prospectively. Twelve (86 %) studies described CT features. Follow-up varied widely; 1 month to 8 years. Prevalence of MP was influenced by accrual: 0.2 % for keyword search versus 1.7 % for consecutive series. Accrual bias affected nine (64 %) studies. 458 (38 %) of 1,209 patients had malignancy at accrual but varied widely (8–89 %), preventing meta-analysis. Sixty (6.4 %) of 933 patients developed new malignancy subsequently, also varying widely (0–11 %). Of just four studies that determined the proportion of unselected, consecutive patients with MP developing subsequent malignancy, three were retrospective and the fourth excluded patients with lymphadenopathy, likely excluding patients with MP.

Conclusion

Studies were heterogeneous, with biased accrual. No available study can determine an association between MP and subsequent malignancy with certainty.

Key Points

• Our systematic review of mesenteric panniculitis found that imaging studies were biased.

• Spectrum and recruitment bias was largely due to retrospective study designs.

• No study could confirm a certain link between mesenteric panniculitis and subsequent malignancy.

• Excessive methodological heterogeneity precluded meaningful meta-analysis.

• High-quality research linking mesenteric panniculitis imaging features and subsequent malignancy is needed.

Malignancy and mesenteric panniculitis

AIM

Mesenteric panniculitis (MP) is a chronic inflammatory process of the small bowel mesentery that has been reported in conjunction with malignancy. The objectives of the present study were to identify the frequency and type of cancers that may coexist with MP and whether these can be seen on the initial diagnostic computerised tomography (CT).

METHOD

A prospective database was kept of patients diagnosed with MP in the Canterbury region of New Zealand between 1 January 2003 and 31 December 2014. CT scans were independently reviewed. Clinical records were reviewed and family doctors were contacted for additional information.

RESULTS

There were 302 patients with possible MP identified and 259 in whom it was confirmed on review. Seventy-eight patients had a diagnosis of malignancy, with 54 having a current cancer (59 total cancers), 33 a past cancer and nine both. Of the 59 current cancers the most common primary sites were colorectum (19), lymph nodes (17), kidney (six) and prostate (four). Fifty-four were at sites included on an abdominal CT scan. At all sites [except prostate (0/4)] there were high rates of detection on CT with 44/54 cancers visible including 20/23 gastrointestinal tract, 14/17 lymphomas and 9/9 non-prostate urogenital tract malignancies. Six people were subsequently diagnosed with cancer after the index CT.

CONCLUSION

When MP occurs in association with malignancy, the commonest primary sites are large bowel, the lymph nodes and the urogenital tract. In those with MP on imaging, any cancer except prostate can usually be seen on the index CT. Further extensive investigation in asymptomatic patients is therefore likely to be of low yield.

De-misty-fying the mesentery: an algorithmic approach to neoplastic and non-neoplastic mesenteric abnormalities

Mesenteric abnormalities are often incidentally discovered on cross-sectional imaging performed during daily clinical practice. Findings can range from the vague "misty mesentery" to solid masses, and the possible etiologic causes encompass a wide spectrum of underlying pathologies including infectious, inflammatory, and neoplastic processes. Unfortunately, the clinical and imaging findings are often non-specific and may overlap. This article discusses the various diseases that result in mesenteric abnormalities. It provides a framework to non-invasively differentiate these entities, when possible.

Sclerosing Mesenteritis and Disturbance of Glucose Metabolism: A New Relationship? A Case Series

BACKGROUND

Sclerosing mesenteritis is an idiopathic inflammatory and fibrotic disease that affects the mesentery. It is a rare disease, with the total number of reported cases in the literature ranging from 122 to 300. It mainly affects men in the sixth decade of life, and its etiology remains unknown. Clinical presentation is variable, but it is frequently asymptomatic. Diagnosis is often made by computed tomography (CT) scan, although biopsy may be needed for confirmation. An association between other diseases (e.g., neoplasms) and sclerosing mesenteritis has been described, but the relationship between the latter and glucose changes is not disclosed in the currently available literature.

CASE REPORT

Five cases of sclerosing mesenteritis and glucose metabolism disorders (impaired fasting glucose and type 2 diabetes mellitus) were retrospectively collected and analyzed. The mean age was 65 ± 9.3 years, 80% were male, and all patients were white. Three patients were asymptomatic and the other 2 (40%) had non-specific chronic abdominal pain. Blood tests revealed normal inflammatory parameters (mean HbA1c was 6.4% and fasting blood glucose was 140 mg/dL). The diagnosis was made by abdominal CT scan. The 2 symptomatic patients underwent therapy with colchicine 1 mg/day, with clinical improvement. During the mean 43-month follow-up period, there was no symptomatic progression, thereby maintaining the usual benign course of this condition.

CONCLUSIONS

Sclerosing mesenteritis has only been described in small series and isolated cases, but its diagnosis is becoming more common due to greater access to diagnostic methods and higher awareness of the disease in the medical community. Furthermore, despite the small sample size, we describe a possible association between glucose metabolism impairment and sclerosing mesenteritis.