Epicardial keratinaceous cyst in a tawny frogmouth (Podargus strigoides plumiferus).
Tissues from a tawny frogmouth that died acutely in a zoo collection were submitted for histopathologic examination. A small yellow nodule was observed grossly on the ventricular wall by the zoo veterinarian during collection of tissues. Histologically, the epicardial nodule consisted of a well-circumscribed, thinly encapsulated cyst, 4 mm in diameter. The cyst was composed of gradually keratinizing, attenuated, stratified squamous epithelium, one to three cell layers in thickness. The cyst was filled with laminated keratin and a few keratinized epithelial cells. The cyst was separated from the myocardium by a thin layer of adipose tissue. Based on these observations, the structure was diagnosed as an epicardial keratinaceous cyst.
Puette
M
M
Department of Veterinary Pathology, College of Veterinary Medicine, University of Georgia, Athens 30602-7388, USA.
Latimer
K S
KS
Norton
T M
TM
D000818:Animals; D001715:Bird Diseases; D001717:Birds; D003560:Cysts / Q000473:pathology / Q000662:veterinary*; D003645:Death, Sudden / Q000662:veterinary; D007633:Keratins / Q000032:analysis; D009206:Myocardium / Q000473:pathology
D007633:Keratins