Partial long arm deletion of one X chromosome in a patient with secondary amenorrhea.

A partial long arm deletion of one X chromosome was observed in a patient with secondary amenorrhea and with no features of Turner's syndrome. It was shown that the deleted X chromosome was the inactivated one in all metaphases of the lymphocyte culture and of the tissue culture from gonadal biopsy. The patient was detected during a cytogenetic study of secondary amenorrhea of ovarian origin.