Skin cancer on the scrotum is rare, with an overall incidence of roughly 1.5 cases per million people per year, but the consequences of missing it are serious. Squamous cell carcinoma accounts for the largest share, and scrotal skin has unusual properties that make it vulnerable to chemical and environmental exposures in ways most skin is not. Because the area is seldom examined, these cancers tend to be caught late, which makes knowing the warning signs and treatment landscape genuinely useful.
What Makes Scrotal Skin Vulnerable
The scrotum is not just another patch of skin. It is notably thin and has a very high density of hair follicles, which together make it one of the most absorptive areas of the body. A systematic review of percutaneous absorption studies found that the scrotum was significantly more absorptive than sites like the abdomen, largely because of that dense follicular pathway.1PubMed. Regional variation in percutaneous absorption in in vitro human models: a systematic review This means that chemical carcinogens, whether from industrial exposure, topical medications, or environmental contact, penetrate scrotal skin far more efficiently than they would penetrate, say, the forearm or chest.
That high permeability helps explain one of the oldest puzzles in cancer medicine. The scrotum’s ability to soak up soot, mineral oils, and other industrial substances made it ground zero for the first occupational cancer ever identified. In 1775, Percivall Pott noticed that chimney sweeps developed scrotal cancer at alarming rates and traced it to chronic soot exposure. Later, cotton-mill workers exposed to mineral oils were recognized as another high-risk group.2PubMed Central. A brief history of scrotal cancer The underlying reason, scrotal skin’s extraordinary absorptive capacity, was not understood at the time but is well documented now.3PubMed. Pharmacokinetics of testosterone cream applied to scrotal skin
Types of Skin Cancer That Occur on the Scrotum
Tumors can arise from every layer of scrotal tissue, but the skin cancers that develop on the scrotal surface fall into a handful of recognizable categories. A Dutch population-based study found that squamous cell carcinoma was the single most common type, making up about 27% of all scrotal cancers, followed by basal cell carcinoma at 19%, Bowen’s disease (a form of carcinoma in situ, meaning the abnormal cells have not yet invaded deeper tissue) at 15%, sarcomas at 13%, and extramammary Paget’s disease at 12%.4British Journal of Cancer. Scrotal cancer: incidence, survival and second primary tumours in the Netherlands since 1989 Each of these behaves differently and carries a different prognosis.
Squamous Cell Carcinoma
Squamous cell carcinoma (SCC) is the dominant player. It originates in the flat cells that form the outer surface of the skin and, on the scrotum, tends to be more aggressive than SCC at sun-exposed sites. Researchers have found that about one-third of all scrotal tumors are squamous cell carcinomas.5PubMed Central. Scrotal squamous cell carcinoma: a case report These can present in various ways, from firm, painless nodules to ulcerated growths that bleed intermittently. Two distinct pathways drive scrotal SCC: one linked to human papillomavirus (HPV) infection and one that is HPV-independent, driven instead by chronic irritation or chemical exposure.6Academic Press. Vulvar, Penile, and Scrotal Human Papillomavirus and Non–Human Papillomavirus Cancer Pathways
Basal Cell Carcinoma
Basal cell carcinoma (BCC) is the most common cancer overall in the general population, yet it is rarely seen on non-sun-exposed areas. Fewer than 60 cases of scrotal BCC have been described in the medical literature.7PubMed Central. Basal cell carcinoma arising from the scrotum: An understated entity BCC accounts for roughly 5 to 10% of all scrotal tumors, and when it does appear on the scrotum, it tends to behave more aggressively and metastasize more readily than BCC found elsewhere on the body.8Journal of Clinical Urology. A rare presentation of multiple scrotal basal cell carcinomas secondary to Gorlin’s syndrome That is an important distinction: the reassuring reputation BCC has as a slow-growing, almost benign cancer does not fully apply when it shows up on the scrotum.
Extramammary Paget’s Disease
Extramammary Paget’s disease (EMPD) is an uncommon cancer that shows up as a persistent, red, scaly, or eczema-like patch on the scrotal skin. It often gets mistaken for a fungal infection or dermatitis, sometimes for years. In a study of 20 EMPD cases involving the scrotum, a few patients had focal invasion into deeper tissue, but most remained confined to the surface skin layer, and no patient in the series had spread to inguinal lymph nodes at diagnosis.9PubMed Central. Extramammary Paget Disease of the Scrotum: A Contemporary Clinicopathologic Analysis of 20 Cases in the United States EMPD is slow-moving, but its tendency to look like a benign rash means it can go undiagnosed for a long time.
Warning Signs to Watch For
Scrotal skin cancer does not announce itself with a single unmistakable symptom. Lesions can appear as small raised bumps (papules), firm masses (nodules), areas of persistent swelling, or patches that look like eczema or a chronic rash.10Journal of Surgical Case Reports. Scrotal squamous cell carcinoma: a case report The challenge is that many benign conditions, from cysts to fungal infections to inflamed hair follicles, can produce similar-looking changes.
There are some red flags worth knowing:
- A lump that doesn’t resolve: any nodule or hard spot on the scrotal skin that lasts more than a few weeks and does not respond to basic wound care or antifungal treatment deserves a closer look.
- A non-healing ulcer: an open sore on the scrotum that crusts over, bleeds, and then reopens is a classic presentation for squamous cell carcinoma.
- Persistent redness or scaling: a flat, red, itchy patch that looks like eczema but does not improve with steroid creams may indicate Bowen’s disease or EMPD.
- A pearly or translucent bump: the typical appearance of basal cell carcinoma, though on dark or wrinkled scrotal skin this classic description can be harder to recognize.
- Changes in an existing mole or growth: asymmetry, irregular borders, color variation, or increasing size should prompt evaluation, just as they would anywhere else on the body.
The general rule is the same as it is for skin elsewhere on the body: anything new, changing, or persistent that does not have an obvious benign explanation is worth having examined. Because the scrotum is not routinely inspected during many clinical encounters, you may need to bring it up yourself.
Who Is at Higher Risk
The old industrial exposures that Percivall Pott described in the 1700s are largely historical, but modern risk factors have taken their place.
PUVA Therapy
The strongest modern risk factor in the medical literature is PUVA phototherapy, a treatment for psoriasis and certain other skin conditions that combines a light-sensitizing drug with ultraviolet A radiation. In a landmark prospective study following 892 men who received PUVA, the rate of invasive squamous cell carcinoma on the penis and scrotum was nearly 96 times higher than expected in the general population. Among men who received the highest cumulative doses, the rate was 286 times the general population rate.11PubMed. Genital tumors among men with psoriasis exposed to psoralens and ultraviolet A radiation (PUVA) and ultraviolet B radiation This risk persists long after treatment ends. Follow-up data showed that even years later, the incidence of invasive scrotal and penile SCC remained elevated more than 50-fold compared to what would be expected.12PubMed. The persistent risk of genital tumors among men treated with psoralen plus ultraviolet A (PUVA) for psoriasis
A large Swedish study of nearly 4,800 patients confirmed that the relationship between PUVA and squamous cell cancer is strongly dose-dependent: men who had undergone more than 200 PUVA treatments had over 30 times the general-population rate of squamous cell skin cancer.13The Lancet. PUVA and cancer: a large-scale epidemiological study The practical takeaway is that men who have received PUVA, especially at high cumulative doses, should use genital shielding during treatment sessions and remain under long-term surveillance for scrotal skin changes.
Human Papillomavirus
HPV, and specifically HPV type 16, has emerged as a recognized cause of scrotal squamous cell carcinoma. Researchers have confirmed the presence of HPV16 DNA and active viral transcripts within invasive scrotal SCC tissue, establishing a direct link between the virus and the cancer rather than just coincidental presence.14British Journal of Cancer. Human papillomavirus 16 is an aetiological factor of scrotal cancer A separate case series using cancer registry data also detected HPV16 and the associated p16 protein overexpression in scrotal SCC specimens, reinforcing the role of HPV in at least a subset of these cancers.15PubMed Central. Human Papillomavirus Detection in Scrotal Squamous Cell Carcinoma: Case Series from a Population-Based Cancer Registry
Not all scrotal SCC is HPV-driven. As noted earlier, there are HPV-dependent and HPV-independent pathways. The HPV-driven tumors tend to show “warty” or “basaloid” features under the microscope, while the non-HPV cancers are more often linked to chronic irritation, industrial chemical exposure, or radiation history. Whether HPV vaccination could eventually reduce scrotal SCC rates has not been studied directly, but given that HPV16 is a target of current vaccines, it is a reasonable area of future interest.
Other Risk Factors
Chronic inflammation, poor hygiene, immunosuppression (including in organ transplant recipients on long-term immunosuppressive drugs), and prior radiation to the pelvic area all appear in clinical case reports as contributing factors. Older age matters too: most scrotal skin cancers are diagnosed in men over 50. Because the condition is so uncommon, large studies quantifying these individual risks precisely do not exist, and much of the evidence comes from case series and clinical observation.
How Scrotal Skin Cancer Is Diagnosed
The only reliable way to confirm scrotal skin cancer is a biopsy, where a small piece of the suspicious tissue is removed and examined under a microscope. Sometimes this is a simple punch biopsy done in an office under local anesthesia. Other times, when the clinical suspicion is high, an excisional biopsy removes the entire visible lesion at once. The histopathology report determines the cancer type, its depth of invasion, and other features that guide treatment planning.16PubMed. Genital premalignant and malignant diseases: a retrospective study of male genital skin biopsies
Imaging studies like CT scans or MRI may be added when the cancer appears advanced or when there is concern about spread to lymph nodes in the groin. Physical examination of the inguinal (groin) lymph nodes is a routine part of any evaluation. For extramammary Paget’s disease in particular, clinicians sometimes check for an underlying internal malignancy (such as a bladder or colorectal cancer), since EMPD can occasionally be a marker for a cancer elsewhere in the pelvis.
Surgical Treatment
Surgery is the mainstay of treatment for nearly all types of scrotal skin cancer. The two main approaches are wide local excision and Mohs micrographic surgery, and the choice between them has practical consequences for outcomes.
Wide Local Excision
Wide local excision (WLE) means cutting out the tumor along with a margin of normal-looking tissue around it. The removed tissue is then sent to a pathology lab to check whether the margins are clear. If cancer cells are found at the edges, a second surgery may be needed. In one study of extramammary Paget’s disease patients, among 82 cases where intraoperative margin checks were not performed during surgery, 31 (about 38%) were found to have tumor cells at the surgical margin on later pathologic review.17PubMed. Intraoperative frozen biopsy in wide surgical excision of Paget’s disease of the scrotum This high rate of positive margins highlights a persistent challenge with WLE on the scrotum: it can be difficult to tell where the cancer ends and healthy tissue begins.
Mohs Micrographic Surgery
Mohs surgery takes a different approach. Tissue is removed in thin layers, and each layer is mapped and examined under a microscope in real time. This continues until no cancer cells are found at any margin. The method provides complete margin control while sparing as much healthy tissue as possible. A systematic review comparing the two approaches for anogenital squamous cell carcinoma found that Mohs patients had a local recurrence rate of about 5%, compared to roughly 18% for patients treated with WLE. Regional and distant recurrence rates were similar between the two methods.18PubMed Central. Mohs Micrographic Surgery Versus Wide Local Excision in the Treatment of Anogenital Squamous Cell Carcinoma: A Systematic Review Separate data specific to scrotal skin cancer also suggested that Mohs may reduce both local recurrence and post-operative reconstructive complications compared to wide excision.19PubMed. Outcomes of mohs microgrpahic resection for cutaneous malignancy involving the scrotum
The tissue-sparing advantage is not trivial. The scrotum is a functional structure, and removing less tissue means a simpler reconstruction and a better cosmetic and functional result. Mohs is not universally available, though, and for large or deeply invasive tumors, wide excision may still be the more practical choice.
Reconstruction After Surgery
When only a small portion of scrotal skin is removed, the remaining tissue can often be stretched to close the wound directly. When the defect covers less than half the scrotal surface area, a scrotal advancement flap, where surrounding scrotal skin is mobilized and pulled together, usually provides adequate closure. Larger defects require more complex reconstruction, including options like split-thickness skin grafts, local flaps from the inner thigh, or in extreme cases free-tissue transfer from distant donor sites.20PubMed Central. Crafting Contours: A Comprehensive Guide to Scrotal Reconstruction If the testes are exposed after tumor removal, they may be temporarily relocated to pouches in the upper thighs until definitive reconstruction can be completed.
Modern reconstructive techniques aim to maintain both function and cosmetic acceptability. The choice of method depends on the size of the defect, how much healthy scrotal skin remains, and the overall health of the patient. A urologist or plastic surgeon experienced in genital reconstruction is typically involved when the defect is anything beyond straightforward.
Non-Surgical Treatments
Radiation therapy serves as either an alternative or a complement to surgery in select cases. For extramammary Paget’s disease, radiation has been reported to achieve good local control when surgery is not feasible or when a patient declines a large excision.21PubMed. Extramammary Paget’s disease of scrotum treated with radiotherapy Topical chemotherapy agents like imiquimod or 5-fluorouracil are sometimes used for superficial disease, particularly for Bowen’s disease or EMPD that is confined to the epidermis and involves a wide area where surgery would be disfiguring. These topical options tend to be reserved for situations where the cancer has not invaded below the skin surface.
For advanced scrotal SCC that has spread to lymph nodes or beyond, systemic treatments including conventional chemotherapy or, more recently, immunotherapy with checkpoint inhibitors may be considered. Evidence for these approaches in scrotal cancer specifically is thin, drawn mostly from broader data on cutaneous squamous cell carcinoma at other sites. There are no large randomized trials focused on advanced scrotal cancer because of how rare it is.
What Survival Looks Like
Prognosis varies sharply by cancer type and stage. A Dutch population-based study found that five-year relative survival for scrotal squamous cell carcinoma was around 77%, notably lower than the 91% five-year survival seen for squamous cell carcinoma of male skin at other sites. Patients with basal cell carcinoma and sarcoma of the scrotum appeared to fare better, though the numbers were small.22British Journal of Cancer. Scrotal cancer: incidence, survival and second primary tumours in the Netherlands since 1989 – Section: Discussion The lower survival for scrotal SCC probably reflects a combination of later detection, more aggressive biology in that location, and the fact that scrotal skin cancers are often not on clinicians’ radar until they are fairly advanced.
Stage at diagnosis matters enormously. Localized disease that has not spread beyond the scrotum carries a much more favorable outlook than cancer that has reached the inguinal lymph nodes. Distant metastasis, while uncommon, carries a poor prognosis. Because of the aggressive behavior of scrotal SCC relative to SCC elsewhere, the authors of the Dutch study specifically noted that extra caution in treatment planning may be warranted for this subgroup.
Why These Cancers Are So Often Missed
Several factors conspire to delay diagnosis. Men tend not to examine their scrotal skin regularly, and when they do, the naturally wrinkled, variable texture of the scrotum makes it hard to spot subtle changes. Clinicians performing routine physicals may check the testes for lumps but give the scrotal skin itself only a cursory glance. And when a man does notice a bump, sore, or rash on his scrotum, the first assumption from both the patient and the provider is usually something benign: a cyst, an ingrown hair, a fungal infection, contact dermatitis.
That benign-first assumption is statistically reasonable, given how rare scrotal cancer is. But it becomes a problem when the lesion persists and no one reconsiders. Case reports consistently describe patients who were treated empirically for skin infections or dermatitis for months or even years before a biopsy finally revealed cancer. The practical lesson is straightforward: if a scrotal skin change does not resolve with appropriate treatment for the suspected benign condition, a biopsy should be the next step, not another round of topical cream.
Scrotal Self-Examination and When to Seek Help
Most men have heard of testicular self-examination as a screening tool for testicular cancer, but the scrotal skin is a separate structure that deserves its own attention. There is no formal screening guideline for scrotal skin cancer because the condition is too rare to justify population-level screening. Instead, awareness is the tool. When checking the testes, take a moment to look at and feel the scrotal skin itself. You are looking for any new lump, any sore that will not heal, any persistent patch of redness or scaling, or any change in a mole or pigmented area.
Any of those findings deserve a visit to a dermatologist or urologist. If you have a history of PUVA therapy, prior radiation to the pelvis, chronic genital skin conditions, immunosuppression, or known HPV infection, your threshold for seeking evaluation should be lower. These are the groups where vigilance pays off most, because the cancers that arise in these contexts tend to be squamous cell carcinomas, the subtype with the most concerning survival profile on the scrotum.