Volume 23 (2):112-120, 2019.
Types and histopathological characteristics of
equine sarcoid.
Mohammad Hamid Kareem, Sufian Saleh Salman.
Dept.
of Internal & Preventive Medicine, College of Veterinary Medicine,
University of Baghdad, Iraq.
ABSTRACT
Kareem MH, Salman SS., Types and histopathological
characteristics of equine sarcoid, Onl J Vet Res., 23
(2):112-120, 2019. We report types and histopathology of equine sarcoid found in Baghdad Province,
Iraq. One hundred skin samples from horses of different sex and age were excised
and fixed in 10% formalin to confirm diagnosis and histopathology. Equine sarcoids were identified as ocular, malevolent, fibroblast,
nodular or mixed types. Our findings revealed that joint, leg, and ocular regions
were most affected. Sarcoid types were fibroblastic in 67%, varrucous
13%, occult or flat 5%, mixed 4% and malevolent in 1%. Microscopy revealed sarcoid tissue characterized by cells with fibroblastic
proliferation and overlying acanthosis, hyperkeratosis and parakeratosis. Pathognomic fingerlike hyperplastic projections of the stratum
basale with fibro-vascular core were evident. We observed
proliferation and hydropic degeneration of granulocytes in the stratum granulosum.
Tumor cells infiltrated the border of normal tissue expanding the dermis and causing
surrounding moderate epithelial hyperplasia. Slides showed fibroblastosis,
deposition of collagen, lymphocytosis and koilocytes
with swollen clear cytoplasm and perinuclear keratinocytes with pyknotic nuclei.
Keywords:
Equine sarcoids, Prevalence, epidemiology,
histopathology, type.
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