Androgen insensitivity syndrome surgery

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Surgery

Complete Androgen Insensitivity Syndrome

Vaginal enlargement For women for whom vaginal shallowness is a problem, enlargement can be achieved by a prolonged course of self-dilation. Surgical construction of a vagina is sometimes performed for adults but carries its own potential problems.

Gonadectomy decision Optimal timing of removal of the testes has been the management issue most often debated by physicians, though whether it is necessary has been questioned as well. The advantage of retaining the (usually intra-abdominal) testes until after puberty is that pubertal changes will happen "naturally," without hormone replacement. This happens because the testosterone produced by the testes gets converted to oestrogen in the body tissues (a process known as aromatisation).

The primary argument for removal is that testes remaining in the abdomen throughout life may develop benign or malignant tumors and confer little benefit. The testicular cancer risk in CAIS appears to be higher than that which occurs with men whose testes have remained in the abdomen, and rare cases of testicular cancer occurring in adolescents with CAIS have been reported. Unfortunately the uncommonness of CAIS and the small numbers of women who have not had testes removed make cancer risk difficult to quantify. The best evidence suggests that women with CAIS and PAIS retaining their testes after puberty have a 25% chance of developing benign (harmless) tumors and a 4-9% chance of malignancy.

There is also the issue of whether medical advances might enable tissue from testes in situ to be used with a donor egg to produce a child via IVF that is genetically related to the XY woman. This chance is lost for ever if the testes have been removed, unless they are preserved in some way. Apart from this, a significant number of CAIS women say that they never felt the same after gonadectomy as a young adult, that they lose their libido etc. Another benefit provided by testes in CAIS is the estradiol produced from testosterone. Although this can be provided pharmaceutically post-gonadectomy, many CAIS women have trouble adjusting to artificial HRT and regret losing their natural source of oestrogen.

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