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87 results for “biopsy”
Chondrosarcomas in Dogs and Cats
Chondrosarcoma is a malignant bone tumor from cartilage cells, second only to osteosarcoma in frequency. It favors flat bones such as ribs, nasal bones, and pelvis and is seen more in German Shepherds. Outlook is guarded even with surgery.
Chondromas in Dogs and Cats
Chondromas are benign cartilage tumors that arise in the long bones and affect the ribs, pelvis, and sternum. They are attached to bone and need surgery only when swollen or pressing on a nerve. Most cause no signs and need no treatment.
Osteosarcomas in Dogs and Cats
Osteosarcoma is a malignant bone tumor from abnormal osteoblasts, most common in large and giant dog breeds. The main sign is lameness, with swelling, pain, and possible pathological fracture. Early limb amputation plus anti-cancer medication is standard, but the outlook is poor.
Osteomas in Dogs and Cats
Osteomas are common benign bone tumors formed from bone tissue, often linked to exostoses, injury, bone inflammation, or nutritional disorders. They usually cause no signs unless they press on a nerve or organ. Surgery is used when the site allows, and amputation for malignant limb tumors.
Mammary Tumors in Dogs and Cats
Mammary tumors are common in intact female dogs and are the third most common feline tumor. They often appear as firm nodules in the mammary chain and can ulcerate or spread to lymph nodes and lungs. Early spaying sharply lowers risk, and surgery is the main treatment.
Cutaneous Fibromas in Dogs and Cats
Cutaneous fibromas are benign tumors that arise spontaneously or after injury and can occur anywhere on the skin of dogs and cats. They are well-defined, hairless, and rarely ulcerate, and small ones may need no treatment. Surgical removal cures most cases.
Cutaneous Mast Cell Tumors in Dogs and Cats
Cutaneous mast cell tumors can appear anywhere on the skin or internal organs, most often on the hind legs, perineum, and prepuce. They vary from slow soft lumps to fast hard nodules and may ulcerate. Surgical removal of well-defined tumors is the main treatment.
Fibrosarcomas in Dogs and Cats
Fibrosarcoma is a malignant tumor of fibrous tissue and the second most common mouth tumor in dogs. About 60 percent arise in the skull bones and 30 percent in the long bones. It is firm, invasive, and bleeds easily when sampled. Surgery is the main treatment.
Papillomas in Dogs and Cats
Papillomas are benign tumors of the skin's outer layer, among the most common epidermal tumors of dogs and rare in cats. They appear as cauliflower-like, often stalked warts that can bleed when injured. Many regress on their own, while others are removed surgically.
Melanomas in Dogs and Cats
Melanomas are pigmented tumors that may be benign or malignant, often in dark-skinned dogs such as Cocker Spaniels and Scottish Terriers. They favor the mouth, eyes, rectum, and perineum, with mucosal sites most at risk. Wide removal is used, but malignant forms carry a poor outlook.