Classification of Tumors Based on Location

Scalp: seborrheic keratosis, epidermal cyst (pilar cyst), nevus, actinic keratosis (bald males), wart, trichilemmal cyst, basal cell carcinoma, squamous cell carcinoma, nevus sebaceous, proliferating trichilemmal tumor, cylindroma, syringocystadenoma papilliferum.

Ear: seborrheic keratosis, actinic keratoses, basal cell carcinoma, nevus, squamous cell carcinoma, keloid, epidermal cyst, chondrodermatitis nodularis helicis, venous lakes (varix), gouty tophus.

Face: seborrheic keratosis, sebaceous gland, hyperplasia, actinic keratosis, lentigo, milium, nevi, basal cell cancer, squamous cell cancer, lentigo maligna melanoma, flat wart, trichoepithelioma, dermatosis papulosa nigra (black females), fibrous papule of the face, colloid milium, dilated pore of Winer, keratoacanthoma, pyogenic granuloma, Spitz nevus, ephelides, hemangioma, adenoma sebaceum, apocrine hidrocystoma, eccrine hidrocystoma, trichilemmoma, trichofolliculoma, Merkel cell carcinoma, angiosarcoma (elderly males), nevus of Ota, warty dyskeratoma, atypical fibroxanthoma, angiolymphoid hyperplasia with eosinophilia, blue nevus.

Eyelids: pedunculated fibroma, seborrheic keratosis, milium, syringoma, basal cell carcinoma, xanthoma.

Neck: pedunculated fibroma, seborrheic keratosis, epidermal cyst, keloid.

Lip and mouth: Fordyce's disease, lentigo, venous lake (varix), mucous retention cyst, leukoplakia, pyogenic granuloma, squamous cell carcinoma, granular cell tumor (tongue), giant cell epulis (gingivae), verrucous carcinoma, white sponge nevus, acral lentiginous melanoma.

Axilla: pedunculated fibroma, epidermal cyst, molluscum contagiosum, lentigo (multiple lentigo in neurofibromatosis called Crowe's sign).

Chest and back: seborrheic keratosis, angioma, nevi, ephelides, actinic keratosis, lipoma, basal cell carcinoma, epidermal cyst, keloid, lentigo, cafe-au-lait spot, squamous cell carcinoma, melanoma, hemangioma, histiocytoma, steatocystoma multiplex, eruptive vellus hair cyst, blue nevus, nevus of Ito, Becker's nevus.

Groin and crural areas: pedunculated fibroma, seborrheic keratosis, molluscum contagiosum, wart, Bowen's disease, extramammary Paget's disease.

Genitalia: wart, molluscum contagiosum, squamous intraepithelial lesions, epidermal cyst, angiokeratoma (scrotum), pearly penile papules (around edge of glans), squamous cell carcinoma, seborrheic keratosis, erythroplasia of Queyrat, Bowen's disease, median raphe cyst of penis, verrucous carcinoma, hidradenoma papilliferum (labia majora).

Hands: wart, seborrheic keratosis, actinic keratosis, lentigo, myxoid cyst (proximal nail fold), squamous cell carcinoma, glomus tumor (nail bed), ganglion, common blue nevus, acral lentiginous melanoma, giant cell tumor of tendon sheath, pyogenic granuloma, acquired digital fibrokeratoma, recurrent infantile digital fibroma, traumatic fibroma, xanthoma, Dupytren's contracture.

Feet: wart, nevi, blue nevus, acral lentiginous melanoma, seborrheic keratosis, verrucous carcinoma, eccrine poroma

Arms and Legs: seborrheic keratosis, lentigo, wart, histiocytoma, actinic keratosis, squamous cell carcinoma, melanoma, lipoma, xanthoma, clear cell acanthoma (legs), Kaposi's sarcoma (legs, classic type).

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