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pathologie@vetmed.fu-berlin.de
An 11‐year‐old male neutered domestic shorthair cat was presented with sudden lameness of the left pelvic limb, plus severe signs of pain upon palpation and moderate soft tissue swelling. The owners solely consented to complete blood count, measurement of serum alkaline phosphatase and radiography but declined any other diagnostics. Laboratory findings yielded moderate neutropenia and leucocytopenia, mild anaemia, slightly elevated lymphocytes and eosinophilic granulocytes and alkaline phosphatase within normal limits. Radiographic images of the pelvis, proximal pelvic limbs, lumbar and sacral vertebrae and tail (Fig 1A) revealed a severe, multifocal bone density loss with similar, minimal lesions in the ischium, the fifth lumbar vertebra, and one coccygeal vertebra. Radiographic differential diagnoses included multiple myeloma, malignant lymphoma, bone infarctions or mycotic infection. The bone lesions radiographically remained unchanged and the cat was humanely euthanased after 3 months due to rapidly progressing lethargy, inappetence, vomiting and weight loss.