Meningiomas in young cats with mucopolysaccharidosis I

Area of Science:

• Veterinary Neurology
• Oncology
• Metabolic Disorders

Background:

• Meningiomas are the most common primary central nervous system tumors in cats.
• Typically, feline meningiomas are diagnosed in animals over nine years of age.
• Mucopolysaccharidosis I (MPS I) is a rare lysosomal storage disease caused by alpha-L-iduronidase deficiency.

Purpose of the Study:

• To investigate the occurrence of meningiomas in cats with alpha-L-iduronidase deficient mucopolysaccharidosis I.
• To explore potential associations between MPS I and feline central nervous system tumors.

Main Methods:

• Postmortem examination of seven cats diagnosed with alpha-L-iduronidase deficient mucopolysaccharidosis I.
• Histopathological evaluation for the presence of meningiomas.

Main Results:

• Four out of seven cats (57%) with MPS I had meningiomas identified at necropsy.
• All affected cats with meningiomas were under three years of age, significantly younger than typical feline meningioma patients.
• No clear relationship was established between the meningiomas and the specific metabolic defect of MPS I.

Conclusions:

• Young cats with alpha-L-iduronidase deficient mucopolysaccharidosis I exhibit an increased incidence of meningiomas.
• The findings suggest a potential link between MPS I and early-onset feline meningiomas, warranting further research.
• The underlying mechanisms connecting MPS I and meningioma development in cats remain to be elucidated.