PubMed · 308891
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B Siegel, R Yoran, R Reif. 1978-07-16. [Duodenal hamartomas causing gastrointestinal bleeding].. https://pubmed.ncbi.nlm.nih.gov/308891/
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Hemangiopericytomas are vascular tumors of pericyte origin. Although the majority of cases have been found in adults, a small percentage have been found to be congenital, most involving the subcutaneous tissues. Gastrointestinal involvement is exceedingly rare. All of the congenital tumors were found to be benign. We report a case of congenital duodenal hemangiopericytoma in a neonate which was locally invasive.
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Gastric and duodenal polypoid lesions are almost always diagnosed incidentally and constitute a clinical problem for treatment and follow-up. The histologic types of polypoid lesions in stomach and duodenum are described, as well as the clinical setting in which they are found. Endoscopy and directed biopsies, but particularly diathermic snare polypectomy, are essential to establish a certain histologic diagnosis. Guidelines are given for treatment and follow-up.