Today’s case is a 1-year-old female domestic shorthair cat with a history of lethargy, stunted growth, and an abnormal gait. Residents, this is a good one for you! Post your comments below.
A poorly-positioned whole body, lateral radiograph is available for review. The patient was fractious. There are multiple open physes with poor mineralization of the epiphyses of the long bones. The vertebral endplates are shortened and malformed. The liver is enlarged and rounded.
These changes are indicative of a congenital, developmental or metabolic disease resulting in underdevelopment of the skeleton and epiphyseal dysplasia, with possible involvement of the abdominal organs.
- congenital hypothyroidism
- pituitary dwarfism
- thyroxine-t4 * <0.3 (1.1-3.9 UG/DL)
- FT4, 2 STEP 0.13 (0.52-1.93 NG/DL)
Saunders HM, Jezyk PK. The radiographic appearance of canine congenital hypothyroidism: skeletal changes with delayed treatment. Veterinary Radiology. 1991;32: 171-177.