Ultrastructure of lymphocytes and skin in mucopolysaccharidosis IV A (Morquio syndrome).

Contrary to the reported absence of lymphocytic vacuoles in Morquio syndrome, lysosomal vacuoles were demonstrated by electron microscopy in lymphocytes and dermal cells of a 2 1/2-year-old Turkish girl biochemically and clinically proven to have type A of MPS IV or Morquio syndrome.