A metastatic haemangiopericytoma of the floor of the mouth

Hemangiopericytoma of the gingiva – An exemplary differential of a masquerading tumor

“…Among the most common and frequently encountered lesion is the pyogenic granuloma which in the present case appeared similar clinically; however, in spite of performing oral prophylaxis and multiple excisional biopsies, the patient had given a history of recurrences which is observed in these tumors. [ 9 10 11 ] Bleeding is another clinical feature observed in the present case commonly seen in peripheral giant cell granulomas; however, these lesions tend to appear more blue-purple than red, with cupping resorption in radiographs, low recurrence rate with removal of the inciting factors which were absent in the present case. The aggressiveness of this tumor can be comprehended by reviewing literature with in case reports of hemangiopericytomas recurring as well as occurring simultaneously in the soft palate and mediastinum.…”

A Novel Approach to Hemangiopericytoma of the Sinonasal Cavity

“…6 Hemangiopericytomas are characterized by a typical architectural vascular pattern, "staghorn" or "antler-like", in association with tightly-packed round or spindle cells with plump nuclei and indistinct cytoplasm. [7][8][9] The endothelial cells are demarcated sharply from the tumor cells by a periendothelial ring of reticulin fibers and a fine reticulin network may also surround the individual pericytes. 8 Immunohistochemical findings typically reveal that vimentin is the only marker which is consistently expressed in hemangiopericytoma.…”

“…[7][8][9] The endothelial cells are demarcated sharply from the tumor cells by a periendothelial ring of reticulin fibers and a fine reticulin network may also surround the individual pericytes. 8 Immunohistochemical findings typically reveal that vimentin is the only marker which is consistently expressed in hemangiopericytoma. 6,10 Tumor cells have been rarely reported to express desmin as well as various neural markers such as S-100 protein and myelin-associated protein.…”

“…Chemotherapy has met with very limited success. 8 Most investigators therefore continue to advocate resection with wide margins as the therapy of choice. Recurrences usually occur greater than 5 years after surgery with the recurrence rate ranging from 9.5 to 50%, depending on the length of follow-up.…”

Unklare Raumforderung der Mundhöhle

“…Zum Zeitpunkt des Verfassens dieses Fallberichts war der Patient seit 6 Jahren frei von Lokalrezidiven und Metastasen. » Diagnose: Malignes Hämangioperizytom (Grad-II-SFT/HPC) Nach der Entdeckung von Stout im Jahr 1949 [7] wurden nur wenige weitere Fallberichte über das intraorale HPC veröffent-licht, die sich im Bereich des Mundbodens [9][10][11][12], des Vestibulums bzw. der Wangenschleimhaut [13,14], der Zunge [15,16] und der Gingiva [17] befanden.…”