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Case Reports
. 2005 Apr;7(2):135-9.
doi: 10.1016/j.jfms.2004.08.002.

Secondary hypothyroidism following head trauma in a cat

Richard J Mellanby  1 , Nic D Jeffery, Matt S Gopal, Michael E Herrtage
Affiliations
Case Reports

Secondary hypothyroidism following head trauma in a cat

Richard J Mellanby et al. J Feline Med Surg. 2005 Apr.

Abstract

An 18-month-old female neutered domestic short hair cat was examined because of marked polydipsia and stunted growth following head trauma when it was 8 weeks old. Diagnostic evaluation revealed hyposthenuric urine, low concentrations of thyroid hormone and undetectable thyroid stimulating hormone concentrations which did not rise following thyroid releasing hormone administration. Lateral radiographs of the left and right tibiae revealed incomplete mineralisation of the greater tubercle and open physis. An almost empty sella turcica and a greatly reduced pituitary were visible on magnetic resonance images of the brain. A presumptive diagnosis of secondary hypothyroidism and central diabetes insipidus following head trauma was made.

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Figures

Fig 1.
Fig 1.
(a) T1-weighted parasagittal magnetic resonance image of the cat's brain. Note the small size of the pituitary in an almost empty sella turcica (arrow). (b) T1-weighted transverse magnetic resonance image of the cat's brain at the level of the sella turcica revealing a very reduced pituitary size (arrow indicates small tissue remnant in the sella).
Fig 2.
Fig 2.
(a) Appearance of cat at 18 months of age. The cat is poorly grown but has normal body proportions. (b) The cat had permanent teeth although the dentition was poorly developed and covered in tartar.
Fig 3.
Fig 3.
Lateral radiograph of right and left tibiae at 18 months of age revealing incomplete mineralisation of the tibial tuberosities and open proximal physis.
See this image and copyright information in PMC

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