Vulvar/vaginal cancer
Vulvar/Vaginal cancer
Epidemiology:
Vulvar and vaginal cancer remains a significant concern in gynecological oncology, with an incidence of 1 to 2 per 100,000 women in Western countries and vulvar cancer accounting for around 5% of all female genital cancers 1, 2. Despite advancements in treatment modalities, spontaneous remission (SR) in vulvar and vaginal cancers is considered exceptionally rare, with estimates suggesting that such occurrences exist in less than 1 in 60,000 to 100,000 cancer cases 3.
Clinical Characteristics:
To date, two cases of spontaneous regression of vulvar cancer have been documented. These cases highlight the extreme rarity of this event and its manifestation in young female patients, aged between 15 and 25 years. Both cases involved vulvar primaries with regression observed in adjacent perineal regions, suggesting a localized phenomenon rather than systemic involvement. See Table 1 for detailed case information.
Histological Characteristics:
Of the cases analyzed, the tumors were confined to vulvar sites, with remission occurring in closely associated perineal regions, including the labia majora and perianal area. These localized regression patterns suggest a regionally restricted phenomenon rather than systemic remission. No evidence of distant metastasis or extra-vulvar involvement was documented, as only cases demonstrating clear spontaneous regression of primary vulvar malignancies were included. This focused selection ensured diagnostic accuracy and maintained the clinical specificity of spontaneous regression in vulvar cancer.
Proposed Contributing Mechanisms:
Among the reported cases, the underlying mechanisms responsible for spontaneous remission were not described. The absence of proposed explanations in these reports’ limits understanding of the biological or immunological factors potentially involved. Nevertheless, based on mechanisms identified in related malignancies, immune-mediated responses, local ischemic events, and tumor differentiation may represent plausible contributors to this rare phenomenon in vulvar cancer.
Site and Extent of Remission:
Both documented cases demonstrated complete remission confined to localized vulvar regions, with regression occurring in the perianal area and labia majora. No evidence of regional lymph node involvement or distant spread was reported, suggesting that the remission process remained restricted to the immediate perineal tissue. Follow-up information was limited, though one case documented sustained remission for up to two years, indicating potential long-term disease control in the absence of therapeutic intervention. Collectively, these findings underscore that spontaneous remission in vulvar cancer, while exceedingly uncommon, may occasionally result in stable and clinically significant regression confined to the primary anatomical site.
Table 1: Vulvar/vaginal cancer SR Cases and Clinical Characteristics
Age/sex | Primary site | Remission site | Proposed mechanisms | Follow-up | |
|---|---|---|---|---|---|
15/F | Vulva | Perianal area | Not reported | Not reported | |
25/F | Vulva | Labia majora | Not reported | 2 years |
References:
- Graziottin A. , Serafini A. Hpv infection in women: psychosexual impact of genital warts and intraepithelial lesions. Journal of Sexual Medicine. 2009;6(3):633-645. doi:10.1111/j.1743-6109.2008.01151.x
- Olawaiye A., Cuello M., & Rogers L. Cancer of the vulva: 2021 update. Intl J Gynecology & Obste. 2021;155(S1):7-18. doi:10.1002/ijgo.13881
- Horino T., Takao T., Yamamoto M., Geshi T., & Hashimoto K. Spontaneous remission of small cell lung cancer: a case report and review in the literature. Lung Cancer. 2006;53(2):249-252. doi:10.1016/j.lungcan.2006.05.011
- Skinner MS, Sternberg WH, Ichinose H, Collins J. Spontaneous Regression of Bowenoid Atypia of the Vulva. Obstet Gynecol. 1973;42(1):40–46.
- Berger BW, Hori Y. Multicentric Bowen’s Disease of the Genitalia: Spontaneous Regression of Lesions. Arch Dermatol. 1978;114(11):1698–1699.