An intensely pruritic, eczematous rash with swelling and vesicles, often from an allergen in condoms or personal lubricants.
A general term for inflammation of the glans penis, presenting with erythema, swelling, and sometimes discharge.
An HPV-induced condition with multiple reddish-brown or violaceous papules on the genitalia that are histologically a form of squamous cell carcinoma in situ.
A yeast infection causing erythema of the glans with small, satellite papules or pustules, often with a cottage cheese-like discharge under the foreskin.
A manifestation of reactive arthritis, presenting with painless, shallow erosions on the glans that coalesce into a serpiginous or circinate plaque.
Presents as an itchy, erythematous, and scaly rash on the penile shaft or scrotum.
A firm, dome-shaped subcutaneous nodule containing keratin, which can occur on the shaft or scrotum.
A form of squamous cell carcinoma in situ specifically on the glans penis, presenting as a persistent, well-demarcated, velvety, red plaque.
A rare skin cancer presenting as a persistent, well-demarcated, red, scaly, and eczematous-looking plaque on the penis or scrotum.
A drug reaction that characteristically recurs in the exact same location as a solitary, well-demarcated, dusky red or violaceous plaque that may blister.
Benign, ectopic sebaceous glands appearing as multiple, tiny, yellowish or white papules on the shaft of the penis.
Condyloma acuminata caused by HPV, appearing as single or multiple soft, fleshy, cauliflower-like growths.
A sexually transmitted infection causing a cluster of small, painful vesicles that rupture to form shallow, grouped ulcers.
Presents as an eruption of myriad, tiny (pinpoint-sized), shiny, flat-topped, skin-colored papules, which are common on the penile shaft.
Presents as violaceous, flat-topped papules, often in an annular configuration on the glans penis.
A chronic inflammatory condition causing distinctive white, atrophic, 'cigarette paper' plaques on the glans and foreskin, which can lead to phimosis.
Multiple tiny, white, firm, pearl-like superficial keratin cysts, which can be found on the penis.
A viral infection causing multiple, discrete, skin-colored, dome-shaped papules with a characteristic central umbilication.
An autoimmune disease that can cause scarring blisters and erosions on the glans penis.
A benign, normal variant presenting as one or more rows of small, dome-shaped, skin-colored papules around the corona of the glans.
A general term for pre-cancerous lesions on the penis, including Bowen's disease and erythroplasia of Queyrat.
Presents as well-demarcated, red, shiny plaques on the glans or shaft, often lacking the typical silvery scale.
Now reactive arthritis, which can cause circinate balanitis, a serpiginous or circinate plaque of shallow erosions on the glans.
A parasitic infestation causing intensely pruritic papules and characteristic reddish-brown nodules on the penile shaft and glans.
A benign condition with a firm, cord-like, serpiginous structure encircling the coronal sulcus, representing a thrombosed lymphatic vessel.
Prominent sebaceous glands (Fordyce spots) are a normal variant appearing as tiny yellowish papules on the shaft.
A malignant tumor presenting as a persistent, firm, indurated, warty, or ulcerative lesion that fails to heal.
Primary syphilis presents as a single, painless, firm, clean-based ulcer (chancre) with an indurated border.
A benign inflammatory condition of the glans penis in uncircumcised men, presenting as a solitary, well-demarcated, shiny, moist, red-orange plaque.