Penis

The penis is occasionally afflicted by disease that the pathologist see.

It is afflicted by common skin pathologies.

Diseases

Inflammatory

• Phimosis.
• Paraphimosis.
• Balanoposthitis.
• Balanatis.
  • Plasma cell balanitis.
  • Balanitis xerotica obliterans.
  • Balanitis circinata.
• Lipogranulomas.

Infectious

• HPV infection.
• HSV infection.
• Scabies.
• Pediculosis pubis.
• Syphilis.
• Gonorrhea.
• Lymphogranuloma venereum.
• Granuloma inguinale.
• Chancroid.
• Molluscum contagiosum.
• filariasis - elephantiasis.

Other non-tumour

• Idiopathic scrotal calcinosis.
• Melanocytic lesions, esp. nevi.

Pre-cancerous

• Penile intraepithelial neoplasia (PIN).
• Paget disease (like extramammary Paget disease). (???)

Neoplastic

• Squamous cell carcinoma.
• Merkel cell carcinoma.
• Sebaceous carcinoma.
• Clear cell carcinoma.
• Basal cell carcioma.
• Melanoma.

Others:

• Mesenchymal lesions - see: soft tissue lesions.
• Hematopoetic, e.g. lymphoma.
• Metastasis.

Specific conditions

Phimosis

General

• Cannot be retract forskin.
• Clinical diagnosis.

Microscopic

Features:

• +/-Inflammation.
• Fibrosis.

Notes: Findings non-specific.