Poorly Differentiated Adenocarcinoma of the Jejunum in a Patient With Peutz-Jeghers Syndrome: A Case Report

Case presentation: A 25-year-old male patient presented to the emergency department with generalized peritonitis caused by a perforated jejunal mass. The patient underwent an emergency exploratory laparotomy. There was 800 ml of thin pus in the peritoneal cavity and 5 cm by 6 cm perforated mass over the jejunum, 30cm from the ligament of the treitz, which extends to the mesentery. Palpable jejunal mesenteric lymphadenopathies were found. There were palpable intraluminal polyps with an inverted serosal surface for some of them, which were identified as 10cm proximal and 20cm distal to the mass. The pus was sucked out, and the mass was resected with its mesenteric lymph nodes and segments containing polyps, a total of 40cm of jejunum. Subsequently, end-to-end hand-sewn anastomosis was performed, and the abdomen was closed. The histopathology report showed poorly differentiated adenocarcinoma, stage IIIC (PT3, PN2), and Peutz-Jeghers polyps, suggesting Peutz-Jeghers syndrome. Lympho-vascular invasion was also noted. The tumor has affected seven of the 12 lymph nodes that have been identified. After 6weeks of uneventful follow-up at the surgical referral clinic, the patient was referred to the oncology department for adjuvant chemotherapy.