Primary non-Hodgkin's lymphoma of rectum presenting with rectal prolapse

Primary colorectal diffuse large B-cell lymphoma: A report of eighteen cases in a tertiary care center

Primary colorectal diffuse large B-cell lymphoma (DLBCL) is very rare colon malignancy. It is important to know the main demographic and clinical characteristics of these patients. We conducted a retrospective analysis of 18 patients diagnosed with primary colorectal DLBCL during a 17-year period at the National Cancer Institute of Brazil (INCA) between 2000 and 2018. Demographic characteristics, tumor localization, HIV status, lactate dehydrogenase (LDH) levels, treatment modality and follow-up status were obtained from medical records. Survival was estimated from the date of diagnosis until death. There were 11 male and seven female patients in our cohort, the median age at diagnosis was 59.5 years and four patients were HIV positive. Tumor was mainly localized in the right colon. Patients were treated with chemotherapy (CT) and/or surgical resection. Eleven patients died during a median follow-up of 59 months and the median survival time was 10 months. Six or more cycles of CT (HR=0.19; CI 95% 0.054-0.660, p = 0.009), LDH levels below 350 U/L (HR=0.229; CI 95% 0.060-0.876, p = 0.031) and surgical resection (HR=0.23; CI 95% 0.065-0.828, p = 0.030) were associated with reduced risk of death in univariate analysis. Patient's age and DLBCL right colon localization should be considered at diagnosis to distinguish between DLBCL and other diseases for differential diagnosis. Six cycles of CT, LDH levels below 350 U/L and surgical resection were associated with better survival. Our results are consistent with previous publications and address the importance of correct colorectal DLBCL diagnosis and treatment.

Rectal Lipoma in a 4-Year-Old Boy Presenting with Anal Prolapse

Colonic lipomas, even though rare, are the most common intramural tumor and the second-most common benign tumor of the colon after adenomatous polyps. We present the case of a 4-year-old boy with a large rectal lipoma causing anal prolapse, bleeding, and constipation, to discuss differential diagnostic problems and the proper management. A 4-year-old boy presented with symptoms of anal prolapse and constipation. Anal prolapse was accompanied by a tumor that occasionally was bleeding. Computed tomography was performed to determine the origin of the tumor and its relations with the surrounding tissues. Excision of the mass was performed through retraction through the anus and the anal wall was closed with sutures. Histopathological findings revealed a submucosal lipoma of a 5 cm diameter, with the erosions of the overlying mucosa. The patient was discharged after 3 days with no postoperative complications. Colonic lipomas, even though rare, are the second-most common benign tumor of the colon. Essential reasons for the resection are the potential complications, such as abdominal pain, change in bowel pattern, bleeding, obstruction, intussusception, perforation, and rarely transformation into a liposarcoma. Resection is performed endoscopically if the tumor is <2 cm in diameter and has a narrow base that allows safe ligation. Otherwise, the open procedure should be considered. In our case, prolapse of the mass through the anal canal allowed the transanal resection.

Primary Rectal Lymphoma: A Case Report and Review of Literature

Lymphomas represent common hematological malignancy, and depending on site, they are classified as nodal or extranodal lymphoma. The term extranodal disease refers to lymphomatous infiltration of anatomic sites other than the primary lymphatic sites; however, the diagnosis of primary versus secondary extranodal lymphoma remains challenging. Among the extranodal locations, gastrointestinal system is the most frequent site. The involvement of the stomach, small intestine, and colon is noted. Rectum as primary site for lymphoma is rare in adults and extremely rare in children. We describe a case of primary rectal lymphoma (high-grade B-cell non-Hodgkin's lymphoma) in 11-year-old child. We believe that reporting this case will add to the data about clinical presentation, radiological, nuclear medicine findings, and treatment approaches of primary rectal lymphoma.

Rectal Prolapse in Children: An Update to Causes, Clinical Presentation, and Management

BACKGROUND

Rectal prolapse is a protrusion of rectal mucosa through the anal sphincter. Although uncommon, it is seen more often in children, younger than 4 years of age. The last data analysis of rectal prolapse and its clinical characteristics in children was performed over 30 years ago. Since that time, many medical advances have occurred that may alter our workup and management of this disease in children. We performed a chart review to reassess the clinical characteristics of rectal prolapse and its management.

METHODS

This was a retrospective descriptive analysis study, assessing children less than 18 years of age that were diagnosed with rectal prolapse from 1999 to 2014 at a single tertiary care center. The onset of presentation, demographics, etiology, clinical characteristics, and management were analyzed.

RESULTS

A total of 158 patients were diagnosed with rectal prolapse, with mean age of onset being 3 years. Constipation was the leading cause, with straining being the most common complaint. Stool consistencies with constipation varied. Many patients diagnosed with idiopathic recurrent rectal prolapse had either a social stressor or were described as having unusual behaviors associated with prolapse. Cystic fibrosis was only diagnosed in 4 patients. Thirty-four patients (22%) required surgical correction.

CONCLUSIONS

Constipation remains the main cause of rectal prolapse. Cystic fibrosis is no longer a common etiology for rectal prolapse, because of the implementation of newborn screening. Patients with social stressors or atypical behavior may be at risk for recurrent rectal prolapse.

Rectal Prolapse in Children: Significance and Management

Rectal prolapse is a herniation of the rectum through the anus. It is rare in children. When it does occur, it is usually prior to 4 years of age and due to anatomical variants. A few conditions predispose children to rectal prolapse, the most common being constipation. Cystic fibrosis used to be commonly associated with rectal prolapse, but with the advent of cystic fibrosis newborn screening, this association is no longer as frequently seen. Many recent case reports, detailed in this chapter, describe conditions previously unknown to be associated with rectal prolapse. Management is usually supportive; however, rectal prolapse requires surgical management in certain situations. This review details the presentation of rectal prolapse, newly described clinical manifestations, and associated conditions, and up-to-date medical and surgical management.