Canine Haemangiopericytomas — A Survey of 200 Tumours*

Abstract

Abstract— —Of 200 canine haemangiopericytomas examined, most were slow‐growing, lobulated tumours which occurred principally in dogs between 6 and 14 years of age. Haemangiopericytomas were found more often in females (69 per cent) and in two sites, the forelegs (26 per cent) and thighs (26 per cent). The next most common locations were the chest (11 per cent) and shoulders (8 per cent). Compared to the normal canine population, the haemangiopericytoma is more prevalent in Boxer dogs, German Shepherd dogs, Cocker and Springer Spaniels. Résumé— —Parmi 200 hemangiopéricytomes examinés chez le chien, la plupart sont des tumeurs lobuées à croissance lente, qui apparaissent chez des animaux âgés de 6 à 14 ans. Les hémangio‐péricytomes sont rencontrés plussouvent chez les femelles (69 p. 100) et selondeux localisations: sur les pattes postérieures (26 p. 100) et sur les cuisses (26 p. 100). Ensuite, les leiux d'élection les plus communs sont la poitrine (11 p. 100) et les épaules (8 p. 100). Compte‐tenu de la répartition des races dans la population canine, l'hémangiopericytome est plus fréquent chez les boxers, les bergers allemands. les cockers et les épagneuls. Zusammenfassung— —200 Hämangioperizytome von Hunden wurden untersucht. Die mcisten erwiesen sich als lobuläre Tumoren von langsamer Wachtumsgeschwindigkeit, die hauptäschlich bei Hunden im Alter zwischen 6 und 14 Jahren gefunden wurden. Hämangioperizytome wurden mit größerer Häufigkeit bei Hündinncn (69 Prozent) und in 2 Körperteilen, dem Vorderbein (26 Prozent) und dem Oberschenkel (26 Prozent), gesehen. Die beiden nächsthäufigen Vorkommensorte waren die Brust (11 Prozent) und die Schultern (8 Prozent). Im Verhältnis zur normalen Hundebe‐völkerung erscheint sin Hämangioperizytom mit größerer Frequenz bei Boxern, Deutschen Schäfer‐hunden, Cocker‐ und Springerspanieln.

Study of some non‐leukotic avian neoplasms

“…In the latter the growth consists of solid collections of angioblasts and/or blood filled cavities lined with endothelium. Our description coincides with that of Mulligan (1955), Mills and Nielsen (1967) and Zubaidy and Sokkar (1977) who reported cases of haemangiopericytomas in dogs.…”

Irradiation-Hyperthermia in Canine Hemangiopericytomas: Large-Animal Model for Therapeutic Response<xref ref-type="fn" rid="FN2">2</xref>

“…Their behaviors, histopathological appearances, blood supplies, and therapeutic responses are similar to those of human sarcomas (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). In dogs hemangiopericytomas are often bulky softtissue sarcomas that are encountered on the extremities.…”

“…The histopathological appearance of canine hemangiopericytomas is like that of modified fibrosarcomas (1)(2)(3) and develops in a whorling cellular arrangement, frequently termed a "fingerprint" pattern. The malignant growths seem to originate from the vascular sheath (in humans, called pericytes of Zimmermann) around open or collapsed capillaries.…”

Relationship between DNA Ploidy and Proliferative Cell Nuclear Antigen Index in Canine Hemangiopericytoma

“…"content-markup(./author-grp [1]/aff|./author-grp [1]/dept-list)> Canine hemangiopericytoma (CHP), a relatively common neoplasm, is most often found in the hind limb of dogs, but CHP can develop anywhere on the body. 3,11,14,20 Although the histiogenesis of CHP is not clear, the putative cell of origin is the pericyte. 13,19 The typical histopathologic pattern of CHP is a whirling cellular configuration around a central vessel, the so-called ''fingerprint'' pattern.…”