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PubMed This is a summary of 15 peer-reviewed journal articles Updated
Endocrinology

Treatment Strategy and the Gonadectomy Decision

At a Glance

The standard of care for Complete Androgen Insensitivity Syndrome (CAIS) now recommends delaying a gonadectomy until after puberty. This allows for natural hormone production and spontaneous female puberty while supporting long-term bone health, as childhood tumor risks are extremely low.

One of the most significant decisions a family or young adult with AIS will face is whether and when to have a gonadectomy—the surgical removal of the internal testes (gonads). This decision is no longer a “one-size-fits-all” recommendation. Current medical consensus has shifted toward a more personalized approach that balances health risks with the benefits of natural development [1][2].

The Historical vs. Modern Approach

In the past, doctors often recommended removing the gonads as soon as AIS was diagnosed, even in young children. This was done to eliminate the risk of cancer [3].

Today, the Standard of Care has evolved:

  • For CAIS: Most specialists now recommend delaying surgery until after the individual has completed puberty [4][5].
  • For PAIS: The decision is more complex and depends on the specific physical development and the gender identity of the individual, requiring close discussion with a specialized team [3][6].

Why Wait? The Benefits of Natural Puberty

In Complete AIS (CAIS), the internal testes produce testosterone. Because the body is “deaf” to this hormone, it naturally converts (aromatizes) the testosterone into estrogen [7].

  • Spontaneous Puberty: This natural estrogen allows for a typical female puberty, including breast development and hip rounding, without the need for synthetic hormone pills or patches [8][7].
  • Bone Health: Delaying surgery until after puberty helps the body build stronger bones. Removing the gonads too early can increase the risk of low bone mineral density (osteoporosis) later in life [4][9].

Understanding the Risk of Cancer

The primary reason for considering a gonadectomy is the risk of Germ Cell Tumors (GCTs).

  • Childhood Risk: In CAIS, the risk of a tumor developing before or during puberty is extremely low, estimated at less than 1–2% [4][5].
  • Adulthood Risk: The risk increases as a person gets older, with some estimates suggesting a 10–20% risk by age 50, although the exact numbers are still being studied [10][11]. Some research suggests that the risk might actually decrease after puberty in some cases due to “germ cell depletion” (where the cells that could become cancerous naturally die off), but this is not yet a certainty [10].

The Challenges of Retaining Gonads

If you choose to keep the gonads (either temporarily or long-term), you must be aware of two main factors:

  1. Lack of Standardized Screening: There is currently no “perfect” way to screen for early-stage tumors in undescended gonads. Ultrasound and MRI are used, but they are not 100% accurate at finding very small changes [12][2].
  2. Commitment to Monitoring: Choosing to retain the gonads is not a “set it and forget it” decision. It requires a lifelong commitment to regular check-ups with your medical team [13][11].

A Framework for Decision-Making

There is rarely a “wrong” choice, only the choice that is right for you or your child at this time. Use this table to help organize your thoughts:

Option Pros Cons
Early Surgery (Pre-puberty) Eliminates tumor risk early; pairs well with hernia repair surgery [14]. Requires lifelong hormone replacement therapy, which must be initiated at the age of typical puberty to induce physical development [9].
Delayed Surgery (Post-puberty) Allows for natural, spontaneous puberty; better for bone health [4][15]. Small risk of tumor during adolescence; requires regular monitoring via imaging [13].
No Surgery (Lifelong Retention) Avoids surgery altogether; maintains natural hormone production [13]. Highest long-term tumor risk; requires permanent, lifelong monitoring; no standard screening protocol exists [12].

Note on Vaginal Development

For those with CAIS, an important parallel conversation to the surgical timeline involves vaginal development. Many individuals have a shortened vagina (vaginal hypoplasia). Non-surgical vaginal dilation therapy is the recommended first-line approach for expanding the vaginal canal for future sexual intimacy [1]. A gynecologist specializing in DSDs or a pelvic floor physical therapist can gently guide you through this process when you feel physically and emotionally ready.

Common questions in this guide

Why do doctors recommend waiting until after puberty to remove gonads in CAIS?
Delaying a gonadectomy allows the body to naturally convert testosterone into estrogen, triggering a spontaneous female puberty. This process helps with natural physical development, like breast growth, and builds stronger bones without the need for synthetic hormones.
What is the risk of cancer if I keep my internal testes with AIS?
In Complete AIS, the risk of a germ cell tumor developing during childhood is extremely low, estimated at less than 1 to 2 percent. However, the risk of cancer increases into adulthood, which is why lifelong monitoring or eventual surgical removal is considered.
How are retained gonads monitored for tumors?
Retained gonads are typically monitored using imaging tests like ultrasound and MRI. Because there is currently no standardized screening protocol that is entirely accurate at finding small changes, choosing to keep the gonads requires a lifelong commitment to regular medical check-ups.
Will I need hormone replacement therapy if I have early surgery for AIS?
Yes, if a gonadectomy is performed before puberty, the body will no longer produce its own hormones. You will need to start lifelong hormone replacement therapy around the age of typical puberty to induce physical development and maintain bone health.
How is vaginal hypoplasia treated in Complete AIS?
The recommended first-line approach for expanding a shortened vaginal canal is non-surgical vaginal dilation therapy. A specialized gynecologist or pelvic floor physical therapist can help guide you through this process when you are physically and emotionally ready.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my or my child's specific diagnosis (CAIS or PAIS), what is the estimated percentage risk of a tumor during childhood versus adulthood?
  2. 2.If we choose to defer gonadectomy, what specific monitoring plan (ultrasound, MRI, or blood work) will you use, and how often?
  3. 3.What is the exact screening protocol you follow for monitoring retained gonads?
  4. 4.Can you explain the current debate regarding the 'germ cell depletion' theory—how likely is it that the risk of cancer actually decreases after puberty in CAIS?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (15)
  1. 1

    A novel androgen resistance gene mutation (p.G590W) in complete androgen insensitivity syndrome: Emphasizing the need for early gonadectomy and integrated patient care.

    Sun HY, Wang X, Wang LX, Zhang H

    The Journal of international medical research 2025; (53(6)):3000605251350626 doi:10.1177/03000605251350626.

    PMID: 40552659
  2. 2

    Complete Androgen Insensitivity Syndrome in a Young Girl with Primary Amenorrhea and Suspected Delayed Puberty: A Case-Based Review of Clinical Management, Surgical Follow-Up, and Oncological Risk.

    Fraccascia B, Sodero G, Pane LC, et al.

    Diseases (Basel, Switzerland) 2024; (12(10)) doi:10.3390/diseases12100235.

    PMID: 39452478
  3. 3

    Management of Gonads in Adults with Androgen Insensitivity: An International Survey.

    Tack LJW, Maris E, Looijenga LHJ, et al.

    Hormone research in paediatrics 2018; (90(4)):236-246 doi:10.1159/000493645.

    PMID: 30336477
  4. 4

    Complete androgen insensitivity syndrome and risk of gonadal malignancy: systematic review.

    Barros BA, Oliveira LR, Surur CRC, et al.

    Annals of pediatric endocrinology & metabolism 2021; (26(1)):19-23 doi:10.6065/apem.2040170.085.

    PMID: 33819955
  5. 5

    Timing of Gonadectomy in Patients with Complete Androgen Insensitivity Syndrome-Current Recommendations and Future Directions.

    Patel V, Casey RK, Gomez-Lobo V

    Journal of pediatric and adolescent gynecology 2016; (29(4)):320-5.

    PMID: 26428189
  6. 6

    Partial Androgen Insensitivity Syndrome and Congenital Adrenal Hyperplasia-A Case Report of the Coexistence of Two Rare Diseases in One Patient.

    Krzyścin M, Brodowska A, Furtak G, et al.

    Reports (MDPI) 2025; (8(4)) doi:10.3390/reports8040212.

    PMID: 41283580
  7. 7

    Complete androgen insensitivity syndrome in a 15-year-old female with primary amenorrhea and undescended testes: a rare case report.

    Zerin F, Bhadra TK, Sadia R, Shahriar Z

    Radiology case reports 2026; (21(1)):329-332 doi:10.1016/j.radcr.2025.09.075.

    PMID: 41209089
  8. 8

    Familial complete androgen insensitivity syndrome (CAIS): a case series of three siblings with emphasis on diagnosis, management, and psychosocial outcomes.

    Rajaraman V, Vishwanath U, D Cruze L

    Endocrine 2025; (89(2)):627-631 doi:10.1007/s12020-025-04264-1.

    PMID: 40360874
  9. 9

    The radiologist's role in assessing differences of sex development.

    Hryhorczuk AL, Phelps AS, Yu RN, Chow JS

    Pediatric radiology 2022; (52(4)):752-764 doi:10.1007/s00247-021-05147-z.

    PMID: 34355264
  10. 10

    Clinical Characteristics and Management of Two Cases of Complete Androgen Insensitivity Syndrome With Germ Cell Tumors.

    Wang F, Wang D, Li J, Xing N

    Cancer reports (Hoboken, N.J.) 2026; (9(2)):e70491 doi:10.1002/cnr2.70491.

    PMID: 41725111
  11. 11

    Abdominal Mass in a Phenotypic Female with 46,XY Differences in Sex Development.

    Alam R, Gabrielson AT, Rabinowitz MJ, et al.

    Urology 2023; (173()):e13-e16 doi:10.1016/j.urology.2022.11.039.

    PMID: 36549576
  12. 12

    Screening for gonadal malignancy in androgen insensitivity syndrome: A systematic review.

    Mazhari N, Freedman A, Marshall C, Kokorowski P

    Journal of pediatric urology 2026; (22(1)):105624 doi:10.1016/j.jpurol.2025.09.030.

    PMID: 41102125
  13. 13

    Evolution of Gonadal Management in Complete Androgen Insensitivity Syndrome: A 25-Year Retrospective Cohort Study from a Dedicated Differences of Sex Development Service.

    Learner HI, Kalampalikis A, Da Silva P, Clarke SA

    Journal of pediatric and adolescent gynecology 2026; doi:10.1016/j.jpag.2026.02.007.

    PMID: 41698569
  14. 14

    Genetic variants, clinical characteristics, and surgical treatments of 46 children with androgen insensitivity syndrome.

    Wen X, Fan LJ, Liu P, et al.

    Asian journal of andrology 2026; (28(2)):173-178 doi:10.4103/aja202546.

    PMID: 41504504
  15. 15

    Bone Mineral Density in Women Living with Complete Androgen Insensitivity Syndrome and Intact Testes or Removed Gonads.

    Bertelloni S, Meriggiola MC, Dati E, et al.

    Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation 2017; (11(4)):182-189 doi:10.1159/000477599.

    PMID: 28715798

This page explains surgical and treatment options for Androgen Insensitivity Syndrome for educational purposes. Always consult your endocrinologist and surgical team to determine the best timing for a gonadectomy based on your specific health needs.

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