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  • Presentation

Male Genital Dermatology: Diagnosis, Biopsy, and Management of Common Penile and Scrotal Dermatoses

Description

The speaker emphasized that most male genital dermatoses are noninfectious and that dermatologists should take the lead in evaluating them. He stressed careful history-taking, examining the genitals directly, noting circumcision status and foreskin involvement, and remembering that appearance alone often cannot establish the diagnosis. Biopsy should be performed with a low threshold whenever malignancy cannot be ruled out, especially before treatment alters morphology. The talk reviewed common normal variants such as pearly penile papules and ectopic sebaceous glands, which are benign and often mistaken for STDs or warts and usually require reassurance rather than treatment. It also covered inflammatory and infectious mimickers, including psoriasis, irritant or allergic dermatitis, lichen simplex chronicus, lichen sclerosus, lichen planus, plasma cell balanitis, candidal balanoposthitis, and scabies. Key management points included using topical steroids for many inflammatory conditions, recognizing phimosis as usually pathologic after puberty and often linked to lichen sclerosus, and understanding the small but real squamous cell carcinoma risk in lichen sclerosus. Finally, he discussed male genital dysesthesia or red scrotum syndrome as often neuropathic, frequently associated with back injury or spinal degeneration, and treated with neuromodulating medications such as gabapentin or tricyclics, with reassurance and patient education playing a major role throughout.

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Conclusions

  • Most male genital skin findings are non-infectious, and clinicians should not assume a sexually transmitted infection or cancer without a careful exam.
  • Normal anatomic variation is common on the genitals, so reassurance is often the correct management when lesions are benign and symmetric in appearance.
  • A low threshold for biopsy is warranted whenever malignancy cannot be confidently excluded clinically, because treatment can alter morphology and obscure diagnosis.
  • The presence of a foreskin is associated with more genital skin disease, and examination under the foreskin is essential in uncircumcised men.
  • Phimosis persisting beyond puberty or acquired after puberty is usually pathologic and is often linked to lichen sclerosus.
  • High-potency topical corticosteroids are a major effective treatment for many inflammatory male genital dermatoses, including psoriasis, lichen sclerosus, and some cases of phimosis, often reducing the need for circumcision.
  • Genital psoriasis is common and can be subtle, especially in uncircumcised men, but it has a major impact on quality of life and often requires education plus topical treatment.
  • Irritant dermatitis is likely the most common cause of genital eczema-like symptoms, and management centers on removing irritants, using emollients, and reassuring patients that it is not an STD.
  • Allergic contact dermatitis of the genitals is less common than irritant dermatitis but should be considered when there is exposure to triggers and may need stronger topical steroids.
  • Lichen simplex chronicus reflects chronic scratching or rubbing and is treated by breaking the itch-scratch cycle rather than expecting spontaneous resolution.
  • Lichen sclerosus should be treated aggressively and monitored closely because it is associated with a meaningful risk of penile squamous cell carcinoma and may be premalignant.
  • Lichen planus on the penis can be difficult to treat, so biopsy confirmation, expectation-setting, and control rather than cure are important.
  • Plasma cell balanitis is usually a chronic disease of uncircumcised older men that may respond to topical therapy, but circumcision remains an option and biopsy is needed to exclude SCC.
  • Candida balanoposthitis is especially associated with diabetes and uncircumcised anatomy, so infection should be considered but not over-assumed.
  • Itchy genital papules or nodules should prompt consideration of scabies, and clinicians should ask directly because patients often do not volunteer genital itching.
  • Genital warts are usually HPV 6/11-related, often coexist with higher-risk HPV infection, and are managed with destructive or procedural treatments rather than medications alone.
  • Red scrotum syndrome or male genital dysesthesia is often neuropathic, has negative workups, and is frequently managed with neuropathic agents rather than standard anti-inflammatory therapy.
  • Education, reassurance, and addressing fear of STDs or cancer are central to successful management of male genital dermatology.
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