A 6-year and 9 month-old, male, Shih Tzu dog showed ataxia and trembling. By MRI examination, a mass (1 cm) was found in the right cerebellum.
As the dog did not respond to radiation therapy, and showed a rise of intracranial pressure, he was euthanized.
The cerebellar mass was soft and hemorrhagic. Histologically, the mass contained vimentin-positive spindle- or polyhedral-shaped cells arranged in a cord-like pattern.
Mucinous materials were observed in the intercellular spaces.
Ultrastructural examination revealed cell processes, microtubule-like structures and desmosomes.
The case was diagnosed as myxoid type meningioma.
Source: Suzuki M, Nakayama H, Ohtsuka R, Yasoshima A, Katayama K, Uetsuka K, Ohta M, Matsunaga S, Ogawa H, Uchida K, Doi K. (2002): Cerebellar myxoid type meningioma in a Shih Tzu dog. In:
J Vet Med Sci. 2002 Feb;64(2):155-7.
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