Squamous cells carcinomas

Keywords: squamous, neoplasia, carcinoma, equine, mare, stallion.

Images of squamous cell carcinoma on the penises of two different stallions. At left is a diffuse and erosive form of neoplasia, at right a more proliferative form.

Image size: 900 x 337 pixels. Copyright: Dr. Ram Kasimanickam, ramkasi@vetmed.wsu.edu

These old but unique images illustrate the severe destructive nature of locally invasive squamous cell carcinomas in mares.

Image size: 1000 x 933px

Interestingly, squamaous cell carcinomas in horses tumors do not usually metastasize and are most often treated using cryotherapy.

Used with permission from the Department of Theriogenology, Iowa State University, Ames Iowa. Chairperson; Dr Lawrence Evans. (levans@iastate.edu)

Squamous cell carcinoma requiring phallectomy

Keywords: neoplasia, equine, stallion, phallectomy, squamous, carcinoma

Image size: 1200 x 770px

As mentioned elsewhere, squamous cell carcinoma is a common neoplasm of the equine penis. A large squamous cell carcinoma developed on the glans of this stallion's penis, becoming locally invasive to a severe degree.  This required phallectomy (amputation of the penis).  Less severe cases of squamous cell carcinoma are often treated successfully with cryosurgery or local excision.

Due to the massive corpus cavernosum in a stallion, a major consideration during phallectomy is hemostasis. In that regard, note the large rubber tourniquet on the right side of the operative field.