Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXI
Written by Georgeta DINESCU, Sorina NICOLA, Ioana Cristina FUNDĂȚIANU, Claudia CONSTANTINESCU, Emilia CIOBOTARU
Understanding the pathological processes occurring in the male genital system requires advanced knowledge about its morphofunctional features. Even though the lesions of the male genital system in the dog are not as common, they constantly occur in general practice often being regarded as challenging in terms of diagnosis, treatment and prognosis. This study aims to evaluate the epidemiology, the cytological features and the efficacy of the cytological examination in achieving a definitive diagnosis in male genital system lesions in dogs. This study was conducted over a 5 years period (2008-2012) in the Departament of Pathological Anatomy of the Faculty of Veterinary Medicine Bucharest and consists of 109 male dogs presenting genital lesions. The samples were obtained by fine needle aspiration, imprinting, scraping and surgical biopsy. The slides were prepared by squeezing and sliding techniques. For cytologically examined samples Romanowsky type stains were used: classic or quick MayGrünwald Giemsa and Diff-Quick.29 cases of testicular lesions were both cytologically and histologically examined. During these 5 years, a total of 1872 male dogs have been specifically examined and 109 (5.8%) presented genital lesions. Of the 109 dogs considered for the study, 104 (95.4%) had testicular lesions and 5 (4.6%) had penile lesions. The 104 testicular lesions were diagnosed as follows: 20 cases (19.2%) with cryptorchidism and testicular hypoplasia, 16 cases (15.4%) with testicular degeneration, 10 cases (9.6%) with orchitis, and 58 cases (55.7%) with testicular tumours: seminoma (n=15), Sertoli cell tumours (n=13), interstitial (Leydig) cell tumours (n=15), mixed testicular tumours (n=15). The diagnosed penile lesions included acute balanoposthitis (n=1), squamous cell carcinoma (n=1) and transmissible venereal tumours (n=3). In both cytologically and histologically examined cases, cytological diagnosis was confirmed by histological diagnosis in 90% of the cases. Diagnostic errors occurred in individuals presenting testicular tumours where cytological examination did not confirm histological findings; in these cases histological examination revealed mixed tumours.
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