Seminoma in Cats
Seminoma is a benign (not recurrent or progressive), unilateral tumor of the testis that is extremely rare in male cats (one case of malignant tumor with metastasis has been reported. Typically measuring less than two centimeters in diameter, a seminoma often causes no clinical symptoms in the affected cat and is therefore difficult to identify.
Symptoms and Types
Although seminomas rarely causes any clinical symptoms in the animal, some cats exhibit pain due to pressure from the growing tumor. In a few cases, the testicular mass can be palpapated. Even rarer still, some tumors can become malignant and metastasize to other parts of the body.
Seminomas develop due to cryptorchidism, a fetal abnormality which occurs when one or both testes fail to descend into the scrotum from where they develop in the abdomen.
Your veterinarian will perform a thorough physical examination, searching for a testicular mass and whether or not it is palpable. Cats with a seminoma may exhibit pain or abnormally large testis. Typically, laboratory tests such as complete blood count, biochemistry profile, and urinalysis are within normal ranges, although an ultrasound of the testicular tissue may reveal a mass. In these cases, your veterinarian may recommend performing a tissue biopsy of the testicular mass for further evaluation. If this is not possible, castration may be required to confirm the diagnosis.
The sac that holds the testes; may also be referred to as the scrotal sac
The male sex organ used to produce spermatozoa
An in-depth examination of the properties of urine; used to determine the presence or absence of illness
The prediction of a disease’s outcome in advance
A condition of having only one side
The process of removing tissue to examine it, usually for medical reasons.
Something that becomes worse or life threatening as it spreads
Not being able to cause harm; the opposite of malignant.