I. SKIN DISORDERS (MODULE 3)
1. Malignant Skin Lesions
Basal Cell Carcinoma (BCC)
Pearly or waxy papule or nodule
Rolled/raised borders
Telangiectasias
May ulcerate (“rodent ulcer”)
Slow-growing, rarely metastasizes
Sun-exposed areas: face, scalp, ears, neck, shoulders
Treatment: biopsy; Mohs for high-risk; excision or cryotherapy
Squamous Cell Carcinoma (SCC)
Flat, red, scaly or crusted lesion
May ulcerate and not heal
Faster growing than BCC
More aggressive; can metastasize
Sun-exposed areas or chronically inflamed skin
Treatment: biopsy; Mohs for high-risk lesions
Malignant Melanoma
Arises from melanocytes
Highly aggressive
Asymmetric, irregular borders
Color variation
Often >6 mm
, Evolving lesion
ABCD(E): Asymmetry, Border irregularity, Color variation, Diameter,
Evolving
Treatment: biopsy + urgent dermatology referral
2. Non-Malignant Skin Lesions
Actinic Keratosis
Premalignant; may progress to SCC
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Acrochordon (Skin Tags)
Pedunculated, soft growths
Occur in skin folds
Associated with obesity/diabetes
Treatment: excision, electrocautery, cryotherapy
Cherry Angioma
Small red-purple vascular papules
Increase with age
Always benign
Treatment: cosmetic only
Warts (Verrucae)
Caused by HPV
Rough, raised, cauliflower-like
Treatment: salicylic acid, cryotherapy, excision, immune therapy
II. NAIL DISORDERS
Onychomycosis
Cause: Trichophyton rubrum