Surgical Management of Penile and Preputial Neoplasms in Equine with Special Reference to Partial Phallectomy

Abstract

Penile and preputial neoplasia in horses occurs infrequently and represents diagnostic and therapeutic challenges. The present study was carried out on a total number of 21 equids (14 stallions and 7 donkeys) suffered from different penile and preputial neoplasia. Diagnosis of neoplasms was based up on history of the case, clinical examination as well as histopathological evaluation. Animals with penile and preputial neoplasms were underwent local excision and partial phallectomy with a slightly modified version of the techniques described by William's. The diagnosed neoplasms were penile and preputial squamous cell carcinomas (SCCs; n = 15); sarcoid (n = 4); a-fibrosarcoma; and a melanoma. Local excision was curative in all cases except 5 stallions with SCCs. These stallions had extensive damage of the glans penis, free part of the penis and the inner lamina of the internal fold of the prepuce, and they underwent a partial phallectomy with successful outcome. Follow-up information was obtained by visit and telephone inquiries. In conclusion, penile and preputial neoplasms are commonly encountered in elderly male horses and SCCs are the most common type affecting male external genitalia. Partial phallectomy is effective for management of equine neoplasia if they are confined to the glans and body of the penis and there is no proximal spread or involvement to regional lymph nodes.

Sarcóide recidivante em glande de um equino: Relato de caso

“…A opção pela penectomia parcial, seguindo a técnica descrita por Williams & Williams (1943) foi feita devido à recidiva, localização e tamanho relativamente grande da massa tumoral, desta forma dificultando a realização de outros tipos de tratamentos. De acordo com Rizk et al (2013), a realização da penectomia parcial é indicada em neoplasias que acometem o terço distal do pênis, tendo em vista a baixa ocorrência de recidivas e complicações como a estenose uretral.…”

Perineal incision into the corpus spongiosum penis to resolve persistent post urination haemorrhage after partial phallectomy

“…; Archer and Edwards ; Rizk et al . ). Stallions should be castrated at least 3 weeks prior to undergoing partial phallectomy to prevent erection that may lead to haemorrhage and dehiscence (Schumacher ).…”

Donkey preputial fibrosarcoma (Equus asinus): case report

“…Fibrosarcoma is a rare malignant neoplasm that can occur in all domestic species and can grow anywhere on the organism (Hendrick, 2017).This neoplasm is derived from connective tissue fibers due to an immature proliferation of fibroblasts or undifferentiated spindle cells (Rizk et al, 2013).…”