Penile and preputial tumours in the horse: literature review and proposal of a standardised approach.

This article reviews common genital tumours in horses and proposes a standardised treatment approach. Tumours are prevalent, particularly in older horses, and can cause discomfort and complications. Various factors like age, hygiene, and breed might contribute to tumour development. While treatments range from minor to major surgical interventions, no standard treatment protocol currently exists. The authors suggest that proper assessment of the tumour type, size, and presence of metastases can inform the best treatment approach.

Overview of Genital Tumours in Horses

• The research article begins by acknowledging that penile and preputial tumours in horses are relatively common, particularly squamous cell carcinoma (SCC), which is most often seen in older horses. It discusses various factors that may contribute to the development of these tumours, including breed, castration, coat colour, poor hygiene, and exposure to certain infectious agents.
• The article also notes that reports regarding breed predisposition for tumour development are not conclusive, indicating that any horse may be potentially susceptible to these tumours.

Significance of Tumour Assessment

• The central theme of the research paper is the importance of careful assessment of the primary tumour in determining the optimal treatment protocol. Multiple factors about the tumour, such as how invasive it is, its differentiation grade, size, and the presence of metastases, influence the decision to proceed with additional diagnostic procedures or specific treatment options.
• The paper Unpacks how the risk of tumour recurrence significantly depends on the type of therapy selected and that important factors like the size and histopathological features of the primary tumour also influence the likelihood of recurrence.

Treatment Approaches and Proposal of a Standardised Approach

• The paper discusses the wide range of current treatment methods, from minimally invasive therapies like topical use of 5-fluorouracil to more drastic surgical interventions, like the complete removal and retroversion of the penis and prepuce.
• However, the main contribution of this paper is the proposal of a standardised approach to treating penile tumours in horses. Recognising the absence of a uniform protocol in treating these conditions, the paper suggests a protocol that aims to make specific diagnoses based on careful tumour assessment and consequently tailor the therapeutic approach.