[Unusual giant inclusions in blast cells during acute transformation of chronic myeloid leukemia. Cytochemical and ultrastructural study (author's transl)].

Unusual giant inclusions are reported in the blast cells during the blastic crisis of a chronic granulocytic leukemia. These inclusions coudl have their origin in degenerated mitochondria, and acid phosphatase positivity suggests fusion with lysosomes. A possible viral etiology is discussed.