Abstract
A 15-year-old male has been diagnosed as gynecomastia. Three months later he had an emergency operation for sudden swelling of his scrotum with severe pain. Detail examination revealed ambiguous male external genitalia. However, unicorn uterus, fallopian tube and fimbria ovarica were recognized in the right testis and a small ovarian tissue was also noticed in the left testis.Histopathology of these gonads confirmed true hermaphroditism. The serological characteristics showed coexisted two genetically different erythrocyte populations in the peripheral blood. These erythrocytes were composed of major components of group A (96%) and minor of group B (4%) simultaneously. Cultured lymphocytes revealed 46, XX (94.3%)/46, XY (5.7%) karyotype. Sexdetermining region Y gene (SRY) could be detected by DNA amplifying method using polymerase chain reaction (PCR).These evidences suggested that this chimerism is interpreted as favouring dispermy.
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