Disease Library
A comprehensive reference covering feline diseases across every major body system — causes, symptoms, diagnosis, treatment, and prevention.
Feline Linguatulosis (Tongue Worm)
A genuinely rare parasitic infection with an unusual biological classification (these organisms are sometimes described as pentastomids,…
cancerFeline Liposarcoma
A malignant tumor arising from fat tissue, genuinely uncommon in cats — distinct from the far more common benign lipoma (a fatty benign…
liverFeline Liver Lobe Torsion
A rare but genuinely serious condition where a lobe of the liver twists on its own supporting tissue, cutting off its blood supply — an…
musculoskeletalFeline Long Bone Pain Syndrome (Panosteitis-like)
A genuinely rare, poorly characterized pattern of shifting long bone pain in young, growing cats, conceptually similar to the more…
urinaryFeline Lower Urinary Tract Neoplasia (Bladder Tumors)
Tumors affecting the bladder or urethra, notably less common in cats than in dogs but still occurring — transitional cell carcinoma is the…
cancerFeline Lung-Digit Syndrome (Pulmonary Carcinoma with Digital Metastasis)
A genuinely distinctive and notable pattern where lung cancer (pulmonary carcinoma) spreads specifically to the toes (digits), causing toe…
parasiticFeline Lungworm (Aelurostrongylus abstrusus)
A parasitic infection of the lungs, acquired through ingestion of infected intermediate hosts (typically small rodents, birds, or…
cancerFeline Lymphoma (Lymphosarcoma)
Lymphoma is the most common cancer diagnosed in cats, arising from lymphocytes (a type of white blood cell) and capable of affecting almost…
dentalFeline Lymphoplasmacytic Gingivitis (overlapping with FCGS spectrum)
A specific inflammatory pattern of the gums characterized by a particular type of immune cell infiltration (lymphocytes and plasma cells)…
earFeline Malassezia Otitis
Ear canal infection or overgrowth involving Malassezia yeast, a organism normally present in small numbers within the ear canal that can…
dentalFeline Malocclusion
A misalignment of the teeth or jaw, meaning the upper and lower teeth don't meet correctly when the mouth closes — can be a normal breed…
reproductiveFeline Mammary Fibroadenomatous Hyperplasia
A genuinely distinctive, benign condition causing rapid mammary gland enlargement, most commonly in young female cats following their first…
reproductiveFeline Mammary Fibroepithelial Hyperplasia
A benign, hormonally-driven overgrowth of mammary tissue, genuinely important to distinguish from true mammary tumors (covered in a…
reproductiveFeline Mammary Gland Tumors
Tumors of the mammary (breast) tissue, notable in cats for being malignant (cancerous) in a substantially higher proportion of cases than…
poisoning toxicologyFeline Marijuana/Cannabis Toxicosis
A genuinely increasingly relevant toxicity given growing cannabis product availability and legalization in various regions — cats can be…
cancerFeline Mast Cell Tumor
Mast cell tumors are among the more common skin tumors in cats and can also, less commonly, affect internal organs (particularly the…
musculoskeletalFeline Medial Patellar Luxation (Detailed Grading Spectrum)
While Patellar Luxation is covered generally in another entry, this addresses the specific graded severity spectrum used to classify this…
cancerFeline Mediastinal Lymphoma
A form of lymphoma affecting the mediastinum (the central chest area, including the thymus gland in younger cats), genuinely notable for…
kidneyFeline Medullary Rim Sign
A specific finding on kidney ultrasound where a distinct rim of increased brightness appears at a particular kidney location, genuinely…
digestiveFeline Megaesophagus
An abnormal widening and loss of effective motility (movement) of the esophagus, resulting in food and liquid not being efficiently…
kidneyFeline Membranous Nephropathy
A specific pattern of kidney damage affecting the glomeruli (the kidney's filtering units), causing progressive protein loss into the urine…
poisoning toxicologyFeline Methylxanthine Toxicosis (Beyond Chocolate)
While chocolate toxicity specifically is discussed in relation to that common source, this addresses the broader category of methylxanthine…
earFeline Middle Ear Infection Secondary to Nasopharyngeal Polyp
While middle ear infection (otitis media) and nasopharyngeal polyps are each covered in their own entries, this addresses the genuinely…
earFeline Middle Ear Tumor
A genuinely uncommon presentation where a tumor develops within or extends into the middle ear space, distinct from the polyp-associated…