Geisinger K R, Kawamoto E H, Marshall R B, Ahl E T, Cooper M R
Acta Cytol. 1985 Jul-Aug;29(4):593-7.
The cytopathologic features of a malignant granular cell tumor in both exfoliative and aspiration cytopreparations included isolated cells with low nuclear-cytoplasmic ratios and abundant, diffusely granular cytoplasm. Transmission electron microscopy revealed the diagnostic secondary lysosomes in the neoplastic cells.