background: clinical and epidemiological variation was seen between the colon cancer (cc) and rectum cancer (rc). so, there is not so much data available about the epidemiological and clinicopathological differences and prognostic factors regarding to cc and cr in iran, we aimed to perform this study. methods: all cases of cc and rc referred to oncology and gastroenterology wards of taleghani g...

Gastrointestinal stromal tumor (GIST) is a rare stromal neoplasm, which represents the most common mesenchymal tumor of the gastrointestinal tract. It is characterized by indolent clinical symptoms, although it can present as a life-threatening emergency. Herein, we present two cases of primary small bowel GIST treated at our department. A 68-year-old female patient presented to our emergency d...

The small animal surgeon creates wounds in the gastrointestinal (GI) tract for biopsy, for foreign body or neoplasm removal, or to relieve obstruction. Unlike a skin wound, dehiscence of a wound of the GI tract often leads to generalized bacterial peritonitis and potentially death. Technical failures and factors that negatively affect GI healing are of great clinical significance. Surgery of th...

Even though the diagnosis of schwannoma is usually straightforward in lesions with classic features, tumors with predominantly epithelioid morphology or marked myxoid change may present a diagnostic challenge. There are relatively few reported cases of epithelioid schwannoma entirely lacking classic morphology, and these have occurred in subcutaneous tissues, mucosal surfaces, or as gastrointes...

Orbital lymphoma is very rare malignant neoplasm, usually diagnosed in early stage of disease as primary lymphoma, but dissemination occurs in approximately 33% of cases. Isolated bilateral adrenal lymphomatous involvement is extremely rare, described in 0.83% of cases. We present autopsy case of a 63-year-old man with bilateral orbital diffuse large cell lymphoma, clinical stage IEA, successfu...

Non-Hodgkin's lymphoma of B-cell type is the second most common neoplasm after Kaposi's sarcoma, among patients with human immunodeficiency virus infection. Most non-Hodgkin's lymphoma cases that are associated with acquired immunodeficiency syndrome involve extranodal sites, especially the digestive tract and the central nervous system. We report a case of primary lymphoma of the duodenum in a...

Follicular dendritic cell sarcoma is a rare neoplasm that originates from follicular dendritic cells in lymphoid follicles. This disease usually involves the lymph nodes, and especially the head and neck area. Rarely, extranodal sites may be affected, including tonsil, the oral cavity, liver, spleen and the gastrointestinal tract. We report here on the imaging findings of follicular dendritic c...

A 1.5-year-old, neutered, male ferret (Mustela putorius furo) was presented with sudden lethargy, anorexia, and diarrhea. Clinical and radiographic examinations revealed an intra-abdominal mass. An explorative laparotomy was performed. A neoplasm, located in the ileum wall, was submitted for histopathologic examination. The tumor consisted of weakly eosinophilic spindle cells arranged in a comp...

Hepatic lymphangioma is a rare benign neoplasm characterized by cystic dilatation of the lymphatic vessels in the hepatic parenchyma. In most cases, the hepatic lesion is a part of multi-organ involvement including the liver, spleen, kidneys, skeleton, gastrointestinal tract, mesentery, lungs, and somatic soft tissue. The typical imaging feature of hepatic lymphangioma is a cystic or multicysti...

Angiomyolipoma (AML) is a type of tumor in the perivascular epithelioid cell neoplasm (PEComa) family. Epithelioid angiomyolipoma (EAML), having malignant potential, is considered a rare variant of angiomyolipoma. The most common site of EAMLs is kidney, and extra-renal EAMLs are very uncommon, with liver being the most common site.1 Other locations including retroperitoneum, uterus, liver, lun...