Vacuolated lymphocytes in type II glycogenosis ?A diagnostic approach?

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Abstract
Using electron microscopy, glycogen-filled lysosomes were found in peripheral lymphocytes in 5 cases of the infantile form of glycogenosis type II. In two infants whose blood smears were available, the ultrastructural demonstration of this pathognomonic storage corresponded to well-delineated vacuoles detected by routine light microscopy. Detection of such vacuoles in peripheral lymphocytes by light microscopy and demonstration of glycogenfilled lysosomes by electron microscopy could be a simple and harmless tool for diagnosing the classical form of type II glycogenosis.

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