Hemangiopericytoma of the colon:

A patient with a hemangiopericytoma of the colon is discussed. This is the second such case reported in the English medical literature. Soon after discovery of the tumor, the patient presented with a colonic intussusception with the tumor serving as the lead point. This was reduced by a hypaque enema, but the intussusception recurred twice more, being reduced again by hypaque enema and finally having to be reduced by colonoscopy. At surgery a left hemicolectomy with primary anastomosis was performed. The microscopic, ultrastructural, and pathologic aspects of hemangiopericytoma are discussed with special attention to lesions of the gastrointestinal tract.     

Hemangiopericytoma of the thyroid gland

Hemangiopericytoma is an uncommon tumour of the thyroid gland. We report the fourth case of thyroid hemangiopericytoma in a 77 year-old woman who presented a goiter known for 23 years. The tumour, 11.5 X 7 X 7 cm in diameter, was located in the left lobe. Its histological features were those of a benign hemangiopericytoma as in two cases previously reported. Light microscopy discovered capillaries surrounded by sheets of plump cells and a reticulin network encircling each cell. A few tumour cells showed slight immunoreactivity with antibody against actin. There was no immunoreactivity with antibodies against desmin, vimentin and myosin intermediate filaments. Today, the electron microscopic analysis which revealed that tumour cells looked like pericytes, remains the best investigation for hemangiopericytoma diagnosis.     

Hemangiopericytoma of the rectal mesentery

The authors present a case of hemangiopericytoma of the rectal mesentery, this is an uncommon type of vascular tumor, exceptional in this localization. We analyze the difficulty of a preoperative diagnosis, the lack of specificity of the clinical signs and the importance of the radical resection linked to the biological aggressiveness and the frequency of local recurrences and distant metastases.     

Hemangiopericytoma of greater omentum.

A 67-year-old man presented with a painless abdominal lump. CT scan revealed a large vascular intraperitoneal mass. At laparotomy, a large, vascular tumor was seen to arise from the greater omentum, which was resected. At histology, this tumor was a benign hemangiopericytoma.     

Hemangiopericytoma of the lung--a rare differential diagnosis of lung tumors

The authors report of a 50 year old woman who was operated on because of a rectum carcinoma 5 years ago. At a follow-up examination a 2 x 2 x 1 cm sized tumor was found in the lower lobe of the right lung. Under the diagnosis of lung metastasis after rectum carcinoma resection, operation (wedge resection) was carried out. The histological examination revealed the rare tumor hemangiopericytoma. Based on this case, frequency of the tumor, clinical symptoms, surgical treatment, prognosis as well as recurrence rate and formation of metastases are discussed.     

Leiomyosarcoma of the stomach

Summary The literature is reviewed, and 10 cases of leiomyosarcoma of the stomach are presented. Nine of these were encountered during the 10-year period of 1948–58. The clinical features and roentgenologic diagnosis are discussed. Two cases were of microscopically benign leiomyomas that eventually metastasized. One case involved a gastric adenocarcinoma. A case with gastric fistula leading to the center of a large, necrotic, exogastric leiomyosarcoma is presented. There were 3 long-term survivals, 1 of five years and 2 of ten years. Emphasis is placed on the slow rate of metastasis and the excellent prognosis of long-term survival when the tumors are thoroughly removed.It is suggested that leiomyosarcoma be considered in those cases where (a) gastric tumor, or (b) gastric fistula, or (c) barium outside the confines of the stomach is radiogrphaically shown in the examination of the gastrointestinal tract, in patients whose clinical picture is one of (a) anemia secondary to blood loss, (b) vague epigastric complaints, and (c) long duration of symptoms.     

Sarcoidosis of the stomach

The article describes sarcoidosis affected mucous membrane of the stomach. On the basis of literature data and personal observations (2 cases of sarcoidosis affected the mucous membrane of the stomach in 40 sarcoidosis patients examined), the endoscopic characteristics of the mucous membrane of the stomach are given. It is found that the process is frequently localized in the antral portion of the stomach being combined with +pyloric stenosis. Patients with chronic sarcoidosis were examined, unlike foreign authors who surveyed those with first sarcoidosis. The presence of "sarcoid" changes in the mucous membrane of the stomach appears to be one of the signs of the process manifestation and requires hormonal agents to be used. It is necessary to conduct endoscopic examinations of the gastrointestinal tract to detect both the disease and different chronic lesions of the stomach in a specialized hospital where sarcoidosis patients are treated.     

Adenomyoma of the stomach

Two cases of adenomyoma of the stomach and a review of previous reports in the literature are presented. Adenomyoma is a benign lesion of the pylorus of the stomach composed of smooth muscle, cysts, and glandular structures lined by tall columnar epithelium, Brunner's glands, and sometimes pancreatic tissue. The histopathological and radiological characteristics of this lesion are discussed.     

Lipoma of the stomach

Summary Gastric lipomas are among the rare benign tumors of the stomach. Only 54 cases appear in the English literature. We have reported a case of such a tumor and have discussed pertinent clinical, pathologic, and radiologic features.