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Penile and Preputial Tumors in Dogs and Cats
Tumors of the penis and prepuce are uncommon and, when reported, have been seen only in dogs. Types include papilloma, transmissible venereal tumor, squamous cell carcinoma, fibroma, lymphosarcoma, and hemangioma. Growths may ulcerate, bleed, and produce a foul discharge.
Transmissible Venereal Tumors in Dogs and Cats
Transmissible venereal tumor is a contagious cancer spread between dogs through mating or close contact, destroying the external genitals and nearby mucosa. It appears as a friable, cauliflower-like mass that may bleed and ulcerate. Surgery, freezing, or anti-cancer medication can clear it.
Home Care for Cat Ringworm: Practical, Low-Cost Treatment
Ringworm, or dermatophytosis, is a fungal skin infection in cats caused mainly by Microsporum canis. Mild cases respond to topical antifungals, B-vitamin support, sunlight, and environmental disinfection, while widespread disease needs medicated baths and veterinary-directed oral antifungals.
Skin Disease in Collies and Other Herding Breeds: Why Medication Must Be Chosen Carefully
Collies and related herding breeds often carry an MDR1 gene mutation that prevents normal drug clearance, making them dangerously sensitive to certain parasiticides such as ivermectin. Skin problems are treated as in any dog, but parasite control and other medications must be chosen with a veterinarian to avoid toxicity.
Prostatic Tumors in Dogs and Cats
Prostatic tumors occur mainly in middle-aged and older dogs and mimic benign prostatic conditions. Adenocarcinoma is the most serious type and can spread to local lymph nodes, spine, and pelvis. Signs include weight loss, thirst, back pain, and difficulty urinating.
Sertoli Cell Tumors in Dogs and Cats
Sertoli cell tumors are hormone-producing testicular tumors of older male dogs and cats that cause feminization through excess estrogen. Signs include symmetrical hair loss, enlarged breasts, and a lengthened prepuce. Surgical removal of both testicles resolves most signs within a few months.
Testicular Tumors in Dogs and Cats
Testicular tumors are among the more common tumors in older dogs and are rare in cats. They often cause feminization from excess estrogen, including attraction from other males and symmetrical hair loss. Surgical removal of the affected testicle is the standard treatment, and neutering prevents the disease.
Vaginal and Vestibular Tumors in Dogs and Cats
Vaginal and vestibular tumors are the second most common reproductive tract tumor in female dogs and cats, ranging from benign leiomyomas to transmissible venereal tumors. Signs include a mass protruding from the vulva, difficulty urinating, and bloody or pus-like discharge. Surgical removal is the main treatment.
Uterine Tumors in Dogs and Cats
Uterine tumors are uncommon in dogs and cats, with leiomyomas being the most frequently seen type. They often produce no obvious signs and are found incidentally during abdominal palpation or ultrasound, though bleeding from the vulva can occur. Surgical removal of the uterus and ovaries is the treatment of choice.
Anterior Uveitis (Iridocyclitis) in Dogs and Cats
Anterior uveitis is inflammation of the iris and ciliary body in dogs and cats, causing pain, redness, and light sensitivity. It may arise from eye trauma, infection, or disease elsewhere in the body and requires prompt treatment to protect vision.