|The herd of Andalusian horses clinical history and the laboratory findings were compatible with a diagnosis of Mares showed a marked increase in serum parathyroid hormone (PTH) approximately 10 times normal levels.
Serum PTH was marginally elevated in foals.
Clinical signs (unthriftiness, painful joints, lameness in one or more limbs, and stiff gait) were more pronounced in foals than in mares.
Two foals died and necropsy of one of them revealed extensive soft-tissue mineralization of arterial walls and pulmonary parenchyma.
Clinical signs in mares and foals resolved by 4 weeks after diet adjustment.
Source: J. C. Estepa, E. Aguilera-Tejero, R. Zafra, R. Mayer-Valor, M. RodrÃguez and J. Perez (2006): An Unusual Case of Generalized Soft-Tissue Mineralization in a Suckling Foal. In: Vet Pathol 43:64-67 (2006)
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