Unit 5: Neoplasia Feline, Bovine + Equine (Cram)

What is the most common type of feline neoplasia?

Feline lymphoma

Which infection are some types of feline lymphoma associated with?

Feline leukemia virus (FeLV)

Which feline neoplasia are mostly adenocarcinomas? They tend to be more malignant than the same kind of tumor in dogs

Feline mammary tumors

Which feline neoplasia has a predilection for the metaphysis of long bones of the pelvis limbs?

Feline osteosarcomas

Which bovine neoplasia is commonly called warts? It is the most common tumor of cattle

Bovine papillomatosis

Which virus is bovine papillomatosis caused by?

Bovine papilloma virus

Are warts very pathogenic?

No. They will usually be rejected and fall off unless the animal is immuno–compromised

What is the other bovine neoplasia is caused by bovine papilloma virus? It affects the penis of young bulls (<3 yrs)

Bovine penile fibropapilloma

Do bovine penile fibropapillomas spontaneously regress like warts?

Yes

What is the most common malignant bovine neoplasm?

Bovine ocular squamous cell carcinoma (aka cancer eye)

Which two breed of cattle are predisposed to cancer eye? What makes them predisposed?

1. Hereford

2. Simmental

   White faced breeds without melanin pigmentation of the skin around the eyes

What are the two names for the bovine neoplasm that can be spread by preg checking, AI, and fecal testing?

1. Bovine leukosis

2. Malignant lymphoma

What are the two types of bovine leukosis/malignant lymphoma?

1. Enzootic bovine leukosis (EBL)

2. Sporadic bovine leukosis (SBL)

What virus causes enzootic bovine leukosis?

Bovine leukosis virus

What are the three forms of sporadic bovine leukosis?

1. Juvenile form

2. Thymic form

3. Skin form

Which form of sporadic bovine leukosis is almost always fatal?

Juvenile form

What is the most common tumor of horses? It typically occurs in horses less than four years old

Equine sarcoids

What form of equine sarcoid is this?

Flat

What form of equine sarcoid is this?

Verrucous

True or false: Like bovine warts, picking at a verrucous equine sarcoid helps it to regress

False. Trauma to the lesion may enhance it

What form of equine sarcoid is this?

Fibroblastic (proud flesh)

Can equine sarcoids occur in a mixed form?

Yes

Which colour horse gets equine cancers the most often?

Grey

What virus is equine warts caused by?

Papilloma virus

What is the second most common tumor of horses? They affect the skin, eyes, and genitals. More common in horses with pink skin in these areas

Equine squamous cell carcinomas

What is an equine tumor that arises from skin cells and may be benign or malignant and are almost always black in colour?

Equine melanoma (aka melanosarcoma)

What type of equine melanoma develops in older grey horses?

Benign dermal melanoma

What type of equine melanoma develops in older grey horses as multiple interspersed dermal melanomas? It has a high likelihood of metastasizing

Malignant dermal melanomatosis

What type of equine melanoma is seen in young horses of any colour?

Melanocytes nevi

What type of equine melanoma is very rarely seen. They tend to occur in older non–grey horses. They tend to cause organ metastasis that eventually leads to death

Anaplastic malignant melanoma