Preputial fibroma in a gelding

Abstract

An 11-year-old gelding presented with a large mass located in the dermis of his preputium that surrounded the penis completely. This mass was first noted years ago but did not increase in size. Histological examination diagnosed a fibroma. No treatment was initiated since no signs of discomfort were noticed and the gelding was performing at a high level in competitive showjumping. Next to skin tumours, tumours of the penis and preputium are most common. Most frequently, squamous cell carcinomas and sarcomas are diagnosed. Although fibromas can develop anywhere in connective tissue, a preputial location of a fibroma in a gelding is rare. Differential diagnosis and possible treatment options are discussed

Diagnosis of equine penile and preputial masses: A clinical and pathological perspective

“…) and fibromas; the latter as described by De Meyer et al . () in this issue. Non‐neoplastic conditions that can result in masses or enlargement of the external genitalia in male horses include infection or inflammation (primary or secondary to neoplasia) leading to balanitis or balanoposthitis.…”

“…Other tumour types are uncommon findings on the penis and prepuce of horses but reports include lymphomas, lipomas, neurofibromas, adenocarcinomas, basal cell carcinomas and haemangiosarcomas (Van den Top et al 2010). The case report by De Meyer et al (2017) describes the rare finding of a preputial fibroma in an 11-year-old gelding. Other than the large size of this mass, there were no Diagnosis of equine penile and preputial masses additional clinical signs in this horse.…”

“…The case report by De Meyer et al . () describes the rare finding of a preputial fibroma in an 11‐year‐old gelding. Other than the large size of this mass, there were no additional clinical signs in this horse.…”

“…In such cases, it is important to evaluate the external genitalia thoroughly and devise a methodical diagnostic and treatment plan to allow for accurate prognostication and optimal survival rates. Masses of the prepuce and penis include tumours of epithelial, mesenchymal or round cell origin such as squamous cell carcinoma (SCC), papillomas, melanocytic tumours, lymphoma, sarcoids, fibrosarcomas (Van den Top et al 2010) and fibromas; the latter as described by De Meyer et al (2017) in this issue. Non-neoplastic conditions that can result in masses or enlargement of the external genitalia in male horses include infection or inflammation (primary or secondary to neoplasia) leading to balanitis or balanoposthitis.…”

“…As mentioned by De Meyer et al . (), consideration of geographical prevalence of certain infectious causes of penile and preputial inflammatory lesions is an important component of clinical evaluation. Balanitis or balanoposthitis can also accompany tumours of the penis or prepuce due to ulceration or necrosis of tissues secondary to the neoplastic process.…”