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Skeletal disease in a hypothyroid foal
The Cornell Veterinarian
|October 1, 1984
Insights
Hypothyroidism in a young Thoroughbred colt caused significant skeletal abnormalities. These included delayed bone development and specific lesions like osteochondrosis dissecans, impacting growth.
Area of Science:
- Veterinary Medicine
- Endocrinology
- Equine Science
Background:
- Hypothyroidism is a common endocrine disorder in animals.
- Early diagnosis and treatment are crucial for preventing long-term complications.
Observation:
- A 5-month-old Thoroughbred colt presented with clinical signs suggestive of hypothyroidism.
- Diagnostic evaluations included clinical and clinico-pathology examinations.
- Microscopic examination of the thyroid gland confirmed the diagnosis.
Findings:
- The colt exhibited delayed ossification and cartilage model development.
- Epiphyseal plate closure was delayed, with transverse trabeculation observed in metaphyses.
- Specific skeletal lesions such as osteochondrosis dissecans and subchondral cysts were identified.
Implications:
- This case highlights the severe skeletal manifestations of hypothyroidism in young equines.
- Understanding these lesions is vital for accurate diagnosis and prognosis in affected foals.
- Early intervention may mitigate the severity of skeletal developmental issues.
Abstract:
Hypothyroidism was diagnosed in a 5-month-old Thorough-bred colt by clinical and clinico-pathology examinations, thyroid stimulating hormone response test and by microscopic evaluation of the thyroid gland. Skeletal lesions included delayed appearance of ossification centers and delayed development of bone in cartilage models, delayed closure of epiphyseal plates, transverse trabeculation in metaphyses, osteochondrosis dissecans and subchondral cysts.