An unusual case of synchronous lymphoma and adenocarcinoma occurring as a collision tumour in the stomach – a case report

SummaryThe occurrence of malignant gastric lymphoma and adenocarcinoma in the same patient is very rare. Here we report a case of synchronous gastric carcinoma and gastric lymphoma with a follicular growth pattern associated in a 73-year-old man. Preliminary diagnosis gastric tumour was suggested so laparotomy was performed for the purpose of treatment resection of the stomach. In the operation field, there was a main lesion spreading through the whole of the stomach and additional multiple lymph node enlargements at the hepato-duodenal, retro-pancreatic and the para-aortic lymph nodes. A short-term intraoperative examination of one of the metastatic lymph nodes showed lymphoma of the stomach. Palliative total gastrectomy Roux-en-Y was performed. Finally the pathology of the specimen revealed two different collided tumours: adenocarcinoma solidum and non-Hodgkin's lymphoma malignum with follicular growth pattern. Following surgery and chemotherapy, the patient is now in a disease progress state.