Melanosis peritonei is an unusual and uncommon condition characterized by pigment deposition in the peritoneum. It is usually associated with other conditions. During a right inguinal hernia open repair for an 86-year-old gentleman, widespread black spots were observed on the hernial sac. After appropriate histopathological and immunohistochemical studies, the diagnosis of melanosis peritonei was established. The past medical history of the patient included an endoscopic excision of a sigmoid polyp which was found to be an adenocarcinoma with <1mm clearance margin on histopathology. Being recognized as an extremely rare condition, melanosis peritonei should be differentiated from other conditions including metastatic melanoma.
Benign tumours of vascular and lymphatic origin are known as lymphangiomas. In this report, we present a case of a 26-year-old lady admitted with symptoms of small bowel obstruction. Her computed tomography (CT) scan showed a well-defined mass in the small bowel mesentery associated with small bowel volvulus. Segmental resection of the bowel, including the mass, was performed. Microscopic examination and immunohistochemistry of the specimen were consistent with lymphangioma of the small bowel mesentery.
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