Hypo- versus hyper-thyroidism in 2 cats: the culprit for miliary dermatitis/hypersensitivity versus growth retardation

Abstract

In the present case series 2 different cats with diagnosis of hypo-versus hyper-thyroidism with distinct clinical signs were reported. The first case was a 3-month-old male domestic short-hair kitten was presented with a disproportionate dwarfism. Radiographic examination of the long bones revealed epiphyseal dysgenesis and delayed epiphyseal ossification. Congenital primary hypothyroidism was established by low serum total thyroxine and initial treatment composed of levothyroxine. The second case was referred to the clinic with unresolved dermatological problems. On referral alopecia, extensive crusting and matting of the haircoat were evident. Hyperthyroidism and related military dermatitis was detected based on elevated serum total thyroxine and free T4 levels along with skin punch biopsy results. Therapeutical armamentarium composed of methimazole and hyperimmune milk factor. In conclusion, early recognition, diagnosis and treatment caused to intervention all resulted in clinical remission and relief of clinical signs accompanied by normal thyroidal function and laboratory results in both cats.