Introduction

Donkey preputial fibrosarcoma (Equus asinus): case report

“…In horses, fibrosarcoma can occur at any age, with older horses being affected more frequently. (Knottenbelt et al, 2015).A retrospective study of 114 horses affected with tumors in the penis and prepuce, performed by Top et al(2008), reported a single case of fibrosarcoma in the prepuce of an horse (0.9%) and classified it as an unusual type of neoplasm to affect the external genitalia of horses, in addition this study related the ages of the affected animals, wheremost were older animals, with an average age of 19.5 years.The case described here is that of a donkey considered young because it is 4 years old, which makes it even more unusual, beyond the anatomical location of the tumor and the sex of the animal, the development of fibrosarcoma at that age.…”

“…In horses, tumors in the penis and prepuce frequently occur in the veterinary routine (Top et al, 2008;Knottenbelt et al, 2015;Scott & Hughes, 2015).Squamous cell carcinomas are the most common form of penile and prepuce neoplasia in horses (Top et al, 2008;Rizk et al, 2013;Klopfleisch, 2016).Donkeys, however, have a low incidence of reported cases of squamous cell carcinoma (Knottenbelt et al, 2015;Davis et al, 2016).In a study by Davis et al(2016), sarcoid was the most common tumor in both donkeys and horses.In the literature, three cases of sarcoid are reported specifically in the donkey prepuce, one in Portugal (Oliveira et al, 2013) and two in Egypt (Rizk et al, 2013).…”

“…The decision to perform an excisional biopsy took into account the clinical characteristics of the tumor, as it is nodular and pendulous on the skin of the prepuce, firm on palpation, without adherence to the other structure of the donkey's external genitalia and easily located for manipulation and surgical resection.According to Knottenbelt et al, (2015), well-defined tumors, easily accessible and with few anatomical implications are generally the ideal cases for surgical intervention.When the tumor has the properties that support this approach, the effects are very positive and it becomes the best way to obtain a faster diagnosis, which implies less pain, as it is a single procedure.Surgical resection, especially if it is precocious, of fibrosarcomas, is the best treatment option (Klopfleisch, 2016;Daleck& De nardi, 2016;Hendrick, 2017).…”

Unilateral subcutaneous fibroma in the distal femoral region of a 5-year-old Nooitgedacht mare

“…Fibromas in large animals have been described as solitary, slow growing, well-defined, progressive, round to oval intradermal or subcutaneous masses (Scott 1988). They are usually firm, white to tan on cut surface and well demarcated but not encapsulated in horses (Knottenbelt, Patterson Kane & Snalune 2015). Although classified as benign lesions, surgical resection has been recommended and recurrence has been reported with incomplete excision (Colitz et al 2000).…”

“…Although classified as benign lesions, surgical resection has been recommended and recurrence has been reported with incomplete excision (Colitz et al 2000). With complete resection, recurrence is rare (Knottenbelt et al 2015).…”