To the Editor.—
Mucopolysaccharidoses are a group of rare hereditary storage disorders characterized by various lysosomal hydrolase deficiencies. Clinical condition, radiologic and ophthalmologic examinations, urinary mucopolysaccharides dosage, and leukocyte morphology are generally sufficient for diagnosis.1 However, a more precise classification may be difficult. We herein describe a new lymphocyte abnormality observed in 9/9 cases of type II (Hunter disease) in only 3/19 cases of other types of mucopolysaccharidoses.
Capillary blood was collected from 28 children with mucopolysaccharidosis referred to the pediatric department.
