RESUMO
Inflammatory fibroid polyp (IFP) is a rare benign tumor originating from the submucosa of the gastrointestinal tract. Most are found in the stomach, with only one previous case reported in the rectum. IFPs are typically larger than 1 cm in diameter and present symptoms. Colonoscopic examination of an asymptomatic 66-year-old man revealed a small submucosal tumor, 3 mm in diameter, in the rectum. The lesion was completely resected by endoscopic submucosal dissection (ESD) and was histopathologically diagnosed as IFP. We report herein a very rare rectal IFP that could be treated and diagnosed with ESD.
Assuntos
Endoscopia do Sistema Digestório/métodos , Pólipos Intestinais/diagnóstico , Pólipos Intestinais/patologia , Doenças Retais/diagnóstico , Doenças Retais/patologia , Plexo Submucoso/patologia , Humanos , Inflamação/diagnóstico , Inflamação/cirurgia , Pólipos Intestinais/cirurgia , Masculino , Doenças Retais/cirurgia , Plexo Submucoso/cirurgiaRESUMO
We present a case of a primary advanced gastric tumor that was composed of 2 different pathological components: small cell carcinoma and moderately-differentiated adenocarcinoma. The patient was still alive four years after the surgery was performed, without recurrence. A large part of the tumor consisted of a diffuse sheet of small cell carcinoma, which transitioned into another small portion consisting of moderately-differentiated tubular adenocarcinoma components. Therefore, this case raised the possibility that small cell gastric carcinoma may originate from totipotential stem cells of the stomach. Although small cell carcinoma progresses aggressively, and patients with it have an extremely poor prognosis, this patient recovered uneventfully after the surgical resection, and has remained in good health, without any recurrences.
