Introduction. Rectal large cell neuroendocrine carcinoma (LCNEC) is a poorly differentiated neoplasm that is very rare and belongs within the poorest prognostic subgroup among primary colorectal neoplasms. Here, we describe a case of LCNEC of the rectum, which highlights the aggressive clinical course and poor prognosis associated with this disease. Case Presentation. We report a case of a 63-y...

background : colorectal cancer is the most common cancer and the second leading cause of cancer deaths. annually it is the cause of more than 500000 deaths worldwide. therefore, detection and treatment of these tumors could potentially enhance recovery and improve prognosis. this study determines the frequency of colorectal tumors among patients who underwent colonoscopies in imam khomeini hosp...

the gastrointestinal tract is the most frequently involved extranodal location for malt* lymphomas, but malt lymphomas of the large intestine are rarely observed. a treatment for colorectal malt lymphoma has not yet been established. in colonic malt lymphomas, the literature suggests that surgical resection of localized lesion may be the best choice. in the present case, combination of multi-ag...

Large cell neuroendocrine carcinoma (LCNEC) is an aggressive neoplasm with a low frequency of occurrence in the digestive tract. We present a series of eight patients diagnosed with LCNEC of the colon and rectum. Grossly, tumors were presented as endophytic/ulcerative, annular and polypoid masses, with a gray-white color and necrosis in most cases. Histologically, they were high-grade tumors co...

Condyloma acuminatum (CA) is caused by human papilloma virus (HPV) infection, and it often occurs in the genital and perianal regions. The subtypes of HPV mainly include HPV-6, -11, -16, and -18. This case report presents a 37-year-old woman admitted to hospital because of lower abdominal pain and increased stool frequency for > 1 year. Colonoscopy found a neoplasm with a diameter ~5 mm in the ...

Primary malignant melanoma of the anus and rectum is a rare and aggressive neoplasm that tends to invade locally and metastasize early in the course of the disease. It is often misdiagnosed as hemorrhoids or as one of the other benign anorectal conditions and is thus linked to an overall poor prognosis and a 5-year survival rate of less than 20%. Optimal treatment is still controversial, and cu...

Introduction The aim of the study was to analyze the clinicopathologic characteristics and prognostic factors of hindgut-rectal neuroendocrine neoplasms. Material and methods The study included 38 patients with rectal neuroendocrine tumors who were treated at the Department of Endocrinology, Metabolism and Internal Diseases, Poznan University of Medical Sciences, Poznan, Poland from February ...

BACKGROUND Extra-gastrointestinal stromal tumor is defined as a mesenchymal neoplasm arising from soft tissues outside the gastrointestinal tract. Prostatic extra-gastrointestinal stromal tumor has rarely been noted. CASE REPORT A 56 year-old man presented with pain in the anal region. A digital rectal examination revealed that the prostate was markedly enlarged with a smooth, bulging surface...

Schwannoma or neurilemmoma is a well-defined, benign tumor, which arises from neural crest cells and surrounds the nerve sheath. It is rare neoplasm that is typically found in the extremities, such as the thorax, head, neck, pelvis and rectum. Schwannoma localized to the pancreas is particularly rare and only a limited number of cases have been reported in the literature to date. The present st...

Endometriosis occurs in women of reproductive age and is most commonly found on the peritoneal surface of the reproductive organs. The prevalence of the disease in the general population ranges between 1 and 8% according to different series.1 The intestine is affected in less than 20% of patients suffering from gynaecological endometriosis. In the rectosigmoid colon, endometriosis may mimic eit...