Hypothyroidism Versus Hyperthyroidism in Two Cats: The Culprit for Miliary Dermatitis Versus Growth Retardation

    Songül Erdoğan, Kerem Ural, Hasan Erdoğan
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    TLDR One cat with low thyroid hormone had growth issues, and another with high thyroid hormone had skin problems; both got better with treatment.
    In a case series from 2019, two cats with contrasting thyroid conditions were reported, each displaying different clinical signs. The first case involved a 3-month-old male kitten with disproportionate dwarfism, diagnosed with congenital primary hypothyroidism due to low serum total thyroxine levels. Radiographs showed epiphyseal dysgenesis and delayed ossification, and the kitten was treated with levothyroxine. The second case was a cat with unresolved dermatological issues, presenting with alopecia, crusting, and matting of the haircoat. This cat was diagnosed with hyperthyroidism and miliary dermatitis, indicated by elevated serum total thyroxine and free T4 levels, and a skin punch biopsy. Treatment included methimazole and hyperimmune milk factor. Both cats achieved clinical remission and normalization of thyroid function following early diagnosis and treatment.
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