Colorectal lymphoma in paediatric patient

Primary gastrointestinal lymphoma is an unusual disease and most commonly occurs in stomach but can involve any part of gastrointestinal tract from esophagus to rectum. Primary colorectal lymphoma is a very rare entity and accounts for 6-12% of gastrointestinal lymphoma. Historically, aggressive B-cell lymphomas have been the most common gastrointestinal lymphoma reported in the literature. Most patients with primary colorectal lymphoma present with abdominal pain but obstruction is unusual. Although the lesions may be evident on radiographic studies but the findings are generally nonspecific and definitive diagnosis relies on histopathological analysis. We present a case of 10 year old girl presented with lower abdominal pain, diarrhea and increased frequency of urine for the last one month. Her ultrasonography showed a mass in left iliac fossa. Barium enema examination and abdomino-pelvic CT scan revealed a presacral mass which on histopathology toned out to be a B cell lymphoma. The mass was surgically removed and chemotherapy was planned