An abnormality of erythrocytes (red blood cells) where, on microscopy, they appear to have a slit through their centre rather than the normal biconcave appearance.

Stomatocytes are usually seen in hereditary stomatocytosis, liver disease, and acute alcoholism. A small number of stomatocytes often form as an artifact resulting from slow-drying of smears.

I noded this because today, in the doctor's office in one of the hospital wards, an intern was asking "what are stomatocytes?" after reading a haematology laboratory report. So I went back and found out. And here it is.

picture at and a description at

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