Natsuki Tokura

Collision carcinoma at the esophagogastric junction.

Atrue collision carcinoma at the esophagogastric junction is rare. In this article, we report colliding double primary cancers of the esophagus and the stomach in a 68-year-old man and discuss this entity. Pathological analysis after total gastrectomy and partial esophagectomy showed the following findings. Areas of squamous differentiation were found on the esophageal side of the tumor and were adjacent to normal mucosa, and areas of glandular differentiation were found to the gastric side of the tumor and adjacent to normal mucosa. These two tumors collided at the esophago-cardiac junction, but there was no intermingling. In one lymph node, an independent non-intermingled metastatic adenocarcinoma and squamous cell carcinoma were observed. The pathological findings of this case satisfy rigorous criteria for collision carcinoma.

A Case of Hyperplastic Polyp at The Ureterosigmoidal Anastomosis Occuring 11 Years after Total Cystectomy.

今回, われわれは膀胱全摘後11年して血便を契機に発見された, 尿管S状結腸吻合に発生した乳頭状腫瘍を経験したので報告する. 症例は58歳の男性で, 血便を主訴に当院を受診した. 入院後の注腸検査と下部消化管内視鏡検査にてS状結腸の尿管吻合近傍に腫瘤の形成を認めたため, 悪性腫瘍を疑ったが, 生検ではGroup2であった. 尿管S状結腸吻合術後のS状結腸に発生する腫瘤には癌の頻度が高いことからS状結腸切除を行った. 組織学的には悪性所見は認められず, 陰窩上皮の乳頭状の増生と間質の浮腫, 炎症を伴う過形成性ポリープと診断した. 膀胱全摘出後の尿管S状結腸吻合部に発生した過形成性ポリープの報告は比較的まれで, 今回, 自験例を含めた報告例についての文献的考察を行った.