Routine vaginal smears with good numbers of histiocytes with kidney shaped morphology of their nuclei were selected for the study of sex chromatin topography. A variable distribution of the sex chromatin was found in 125 nuclei studied: polar in 57.4 percent, ventral in 21.9 percent and dorsal in 20.7 percent of the nuclei. No relationship was found between sex chromatin and cytoplasmic morphology and phagocytic activity.
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