Morphology of the caudal fossa in mesaticephalic and brachycephalic cats

Katia Marioni-Henry, Tobias Schwarz, Danielle Gunn-Moore

Research output: Contribution to conferenceAbstractpeer-review


Morphology of the caudal fossa in mesaticephalic and brachycephalic cats
K. Marioni‐Henry1, T. Schwarz1, D. Gunn‐Moore1

1Hospital for Small Animals, Royal Dick School of Veterinary Studies, Roslin, UK

Morphological abnormalities of the caudal fossa are increasingly recognized as a cause of morbidity in many brachycephalic dogs with round broad heads and shortened facial bones such as Cavalier King Charles Spaniels. The study objective was to investigate presence of similar morphological abnormalities of the caudal fossa of mesaticephalic and brachycephalic cats.

The records of the Diagnostic Imaging Service at the R(D)SVS were searched for MRI studies of brain of cats from January 2014 to June 2015. Twenty‐six cases were identified, four MRI were eliminated due to structural intracranial abnormalities. T2W sagittal images of the remaining 22 MRI studies were blindly analyzed by KMH. Subjective assessments included coning of the cerebellar vermis, indentation of the cerebellum by the supraoccipital bone, iso‐ to hyper‐intense material in the middle ear and, when concurrent MRI studies of the spine were available, presence of syringohydromyelia. Measurements of foramen magnum and cerebellar herniation, area of the cerebellum, length of the forebrain and cerebellum were also acquired.

After the MRI studies were reviewed they were unblinded and the data were divided in 2 groups based on the classification of the cat breeds among mesaticephalic (16 cats: 14 Domestic Shorthaired cats, 1 Ragdoll and 1 Maine Coon) or brachycephalic (6 cats: 2 Burmese cats, 1 British Shorthaired, 1 Burmilla, 1 Chinchilla, 1 Tiffany). Cerebellar coning and cerebellar indentation by the foramen magnum was reported in 5/6 cats (83%) of the brachycephalic group versus 8/16 cats (50% for cerebellar coning) and 3/16 (19% indentation) of the mesaticephalic group.
Original languageEnglish
Number of pages1
Publication statusPublished - 22 Dec 2015
Event28th ESVN-ECVN symposium
: Movement Disorders – “Moving on”
- Amsterdam, Netherlands
Duration: 18 Sep 201519 Sep 2015


Conference28th ESVN-ECVN symposium


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