Alberto Pizarro Gallardo^(1)
(1)Facultad de Medicina U.A.N. - Tepic. Mexico

	[Gastroenterology & Hepatology]	[Pathology]

INTRODUCTION

In the Gastrointestinal tract the majority of leiomyomatous tumors arise from the muscularis of the stomach and gastric blood vessels. Since leiomyomatous lesions of the alimentary canal sometimes are discovered incidentally at autopsy or during the course of others operations. ^{(1 )}

A leiomyomatous mass growing from the wall of the stomach is liable to suffer ulceration and consequently to cause gastrointestinal haemorrhage and anaemia.^(1-2) The term " leiomyoblastoma" was proposed by Stout. It is most frecquently seen in the gastric wall but may occasionally be encountered in the intestines, omentum, mesentery, retroperitoneum, uterus, mediastinum, and deeper superficial soft tissues.^(1-3) Leiomyoblastoma (bizarre leiomyoma, epithelioid leiomyoma) is an unusual type of smooth muscle tumor wich is biologically benign in most cases, but on rare occasions may behave in a malignant manner and metastasize.^(1-4)These neoplasm form solitary,well-defined, but not encapsulated, rounded or lobulated masses which, when small, tend to be localed intramurally; multiple tumors are rare. Growth may take place towards the lumen, resulting in a polypoid mass and is covered by an attenuated mucosa.

Leiomyoblastomas are benign neoplams that occur in the gastrointestinal tract as well as as the mesentery and retroperitoneal region.

The leiomyoblastoma or bizarre smooth-muscle tumor described by Stout⁽³⁾ in the wall of the stomach may also be seen in the wall of the intestine, the mesentery. ⁽⁴⁾ Ultrastructural studies confirm the origin of these tumors from smooth-muscle cells, ^(5,6) and indicatea clse relationship to small arteries and raise the possibitily of an origin from perivascular myocites. ⁽⁶⁾

The leiomyoblastoma is a sarcoma of low grade. its prognosis is better because there is not metastases.

Discussion Board

Any Comment to this presentation?

[ABSTRACT] [INTRODUCTION] [MATERIALS & METHODS] [RESULTS] [IMAGES] [IMAGES-2] [DISCUSSION] [CONCLUSION] [REFERENCES] [Discussion Board]

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	[Gastroenterology & Hepatology]	[Pathology]

Alberto Pizarro Gallardo
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Last update: 16/01/00