Subcapsular Orchidectomy: Definition and Technique
Subcapsular orchidectomy is a surgical castration technique that removes testosterone-producing testicular tissue while preserving the tunica albuginea and epididymis, maintaining scrotal contour—it is performed primarily for androgen deprivation in metastatic prostate cancer, not testicular cancer.
What It Is
Subcapsular orchidectomy is a form of surgical castration that differs fundamentally from radical inguinal orchiectomy. While radical orchiectomy (the standard for testicular cancer) removes the entire testicle and spermatic cord through an inguinal incision 1, 2, subcapsular orchidectomy removes only the testosterone-producing seminiferous tubules and interstitial tissue, leaving behind the testicular capsule (tunica albuginea), epididymis, and a portion of the tunica vaginalis 3, 4.
This procedure is specifically indicated for androgen deprivation therapy in metastatic prostate cancer, not for testicular malignancies 4, 5, 6.
Surgical Technique
The procedure can be performed under local or general anesthesia 3:
Approach and Incision
- Scrotal approach is used (unlike testicular cancer surgery which requires inguinal approach)
- A midline scrotal incision or bilateral hemiscrototal incisions are made
- The testicle is delivered through the incision
Tissue Removal
- The tunica albuginea is incised longitudinally
- All seminiferous tubules and testosterone-producing interstitial tissue are carefully enucleated from within the capsule 3, 4
- The testicular parenchyma is completely removed, leaving only the fibrous capsular shell
- Meticulous hemostasis is achieved
Closure
- The tunica albuginea is closed with absorbable sutures
- The empty capsule is returned to the scrotum, maintaining scrotal contour
- Scrotal layers are closed in standard fashion
- Some surgeons have used CO2 laser for the enucleation to minimize bleeding 7
Optional Modifications
- An intracapsular testicular prosthesis can be placed within the preserved tunica albuginea for improved cosmetic result 8
- The procedure typically takes 30-45 minutes 7
Clinical Efficacy and Outcomes
Subcapsular orchidectomy achieves equivalent testosterone suppression to total orchiectomy (mean postoperative testosterone ~21 ng/dL for both techniques), with similar PSA control and survival outcomes in metastatic prostate cancer 5.
Key Clinical Points:
- Achieves castrate testosterone levels comparable to total orchiectomy and LHRH analogues 5, 6
- Patient satisfaction is similar between subcapsular and total orchiectomy 9
- Approximately 84% of subcapsular orchidectomy patients do not perceive testicular removal on self-examination, versus 28% with total orchiectomy 9
- Lower rates of phantom testis syndrome and post-traumatic stress disorder compared to total orchiectomy 6
- Offers cost advantage and immediate effect compared to LHRH analogues 6
Critical Distinction: Not for Testicular Cancer
This procedure has no role in testicular cancer management. For suspected testicular malignancy, radical inguinal orchiectomy with division of the spermatic cord at the internal inguinal ring is mandatory 1, 2. A scrotal approach is contraindicated in testicular cancer due to higher local recurrence rates 2.