Is true hermaphroditism a primary germ cell disorder?

Area of Science:

• Reproductive Endocrinology
• Human Genetics
• Developmental Biology

Background:

• True hermaphroditism is a rare disorder of sex development characterized by the presence of both ovarian and testicular tissue.
• Understanding the variations in gonadal development and their correlation with genetic and phenotypic presentation is crucial.

Purpose of the Study:

• To analyze clinical and pathological findings in eleven cases of true hermaphroditism over a 20-year period.
• To investigate patterns of gonadal tissue distribution and their relationship with external genitalia, internal anatomy, and karyotype.
• To propose a hypothesis and model for abnormal testicular differentiation in true hermaphroditism.

Main Methods:

• Retrospective review of eleven cases of true hermaphroditism diagnosed between 1965 and 1985.
• Detailed examination of external genitalia (Prader scale), gonadal morphology (macroscopic and microscopic), and internal reproductive organs (uterus, hemiuterus).
• Karyotype analysis and H-Y antigen determination.

Main Results:

• Ovotestis was the most common gonad (11/22), with diverse tissue distribution patterns.
• Ovulation occurred in ovarian tissue; spermatogonia were present in testicular tubules, but no spermatozoa.
• Uterus present in all cases; hemiuterus/lateralized uterus observed in cases with predominantly testicular tissue.
• Karyotypes included 46 XX (5 cases) and 46 XY mosaicism (5 cases).
• Spontaneous puberty occurred in 3/6 females; 4/5 males with residual testicular tissue remained prepubertal.

Conclusions:

• Abnormal testicular differentiation is hypothesized to explain observed gonadal tissue distribution patterns.
• The presence and laterality of uterine structures correlate with the predominant gonadal tissue type.
• True hermaphroditism presents with significant variability in gonadal histology, karyotype, and phenotypic expression.