Cronkhite-Canada syndrome (CCS) is a rare nonfamilial polyposis syndrome characterized by epithelial disturbances both in the gastrointestinal tract and in the epidermis. The pathologic finding of the polyp is usually a hamartomatous polyp of the juvenile type; however, the possibility of serrated adenoma associated malignant neoplasm was reported in some Japanese cases. Up till now in South Ko...

Leiomyosarcoma is an uncommon neoplasm. It occurs more frequently in the uterus, retroperitoneal space, stomach and large vessels. Metastatic leiomyosarcomas to the skin, in general, are extremely rare. Herein, we describe a patient with leiomyosarcomas of uterus who developed multiple cutaneous metastatic leiomyosarcomas on the scalp over the duration of one year. The diagnosis was confirmed b...

While the gastric involvement of pancreatic cancer is occasionally observed as the result of direct invasion, hematogenous gastric metastasis is rare. A 72-year-old Japanese male presented with general fatigue, pollakiuria, and thirst. Computed tomography revealed a 4.6-cm solid mass in the pancreatic tail and a 4.2-cm multilocular cystic mass in the pancreatic head with multiple liver and lymp...

Familial adenomatous polyposis (FAP) is an autosomal dominant disorder caused by mutation of the APC gene. It is characterised by the appearance of hundreds to thousands of colorectal adenomas in adolescence and the subsequent development of colorectal cancer. Various extracolonic malignancies are associated with FAP, including desmoids and neoplasms of the stomach, duodenum, pancreas, liver, a...

Carcinosarcoma is an uncommon biphasic malignant neoplasm consisting of both carcinomatous and sarcomatous components. We report a case of an 84-year-old male with multiple carcinosarcomas occurring in the esophagus and stomach. Endoscopically, a bulky pedunculated polypoid lesion was observed in the middle of the esophagus and a huge discoid lesion in the lesser curvature. The patient received...

Bronchogenic cyst (BC) is congenital abnormality of the tracheobronchial bud derived from the primitive foregut which is predominantly found in the mediastinum. Surgery remains the most common treatment when malignancy is suspected, or when there are presenting. Only infrequently, is BC located at an extrathoracic site. Although rarely located in the stomach, BC should be considered as a differ...

Ectopic pancreas is a rare congenital disorder defined as pancreatic tissue lacking vascular or anatomic communication with the normal body of the pancreas. Most cases of ectopic pancreas are asymptomatic, but it may become clinically evident depending on the size, location and the pathological changes similar to those observed in case of the normal pancreas. It is often an incidental finding a...

Kaposi's sarcoma (KS) is an uncommon malignant neoplasm of mesenchymal tissue that occurs in immunocompromised patients and people of Mediterranean descent. It is most common in males, and skin lesions are usual presentations. However, visceral lesions are common in organ transplant recipients and involve the gastrointestinal tract. Although the gastrointestinal tract is a site for extracutaneo...

To precisely diagnose metastasis state is important for tailoring treatments for gastric cancer patients. However, the routinely employed radiological and pathologic tests for tumour metastasis have considerable high false negative rates, which may retard the identification of reproducible metastasis-related molecular biomarkers for gastric cancer. In this research, using three datasets, we fir...

Gastrointestinal stromal tumors (GIST) are rare, representing less than 1% of all gastrointestinal tumors. However, this is the most frequent nonepithelial neoplasm of the digestive tract. Mean age at diagnose is 58 years old, and the two structures usually involved are stomach and bowel12. The main symptoms are abdominal pain and digestive bleeding2, while the most frequent presentation are so...