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Pituitary tumour apoplexy due to pituitary adenoma in a dog: clinical, 3T MRI and CT features
Author(s) -
Briola Chiara,
Galli Greta,
Menchetti Marika,
Caldin Marco,
Bertolini Giovanna
Publication year - 2020
Publication title -
veterinary record case reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.165
H-Index - 4
ISSN - 2052-6121
DOI - 10.1136/vetreccr-2019-001052
Subject(s) - medicine , pituitary apoplexy , fluid attenuated inversion recovery , magnetic resonance imaging , pituitary gland , radiology , pituitary adenoma , grey matter , pituitary stalk , pathology , white matter , adenoma , hormone
Pituitary apoplexy (PA) is a neurological syndrome resulting from sudden infarction/haemorrhage within a normal or tumoural pituitary gland. Prompt imaging is essential to correlate haemorrhagic/ischaemic changes with clinical signs. The purpose of this report is to describe the clinical, CT and 3T MRI findings of PA in a 13‐year‐old dog previously diagnosed with pituitary‐dependent hyperadrenocorticism. Neurological examination revealed an anxious‐compulsive behaviour, internal ophthalmoplegia and bilaterally reduced menace response. Brain MRI showed a pituitary mass with two focal well‐defined areas. The first was T2 weighted (T2w) and T1 weighted (T1w) hyperintense, FLAIR hypointense to the grey matter, and mildly contrast‐enhancing with signal void artefact in GE‐T2*, compatible with late/subacute haemorrhage; the second was T2w hypointense, T1w, FLAIR and GE‐T2* isointense/hypointense to the grey matter and moderately enhancing, compatible with acute haemorrhage. The dog recovered after 24 hours, but internal ophthalmoplegia remained. To the authors’ knowledge, this is the first report describing MRI findings in a dog with PA.