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q
- Benign juvenile melanoma (Spitz nevus)
- Nevoxanthoendothelioma
- Mastocytoma
- Metastases
- Keratoacanthoma
- Epidermoid cyst
- Pilar (tricholemmal) cyst
- Cylindroma
- Meningioma
- Melanoma
- Aplasia cutis congenita
- Psoriasis
- Scarring alopecias
(see differential of “Alopecia: Scarring”)
- Kerion
- Atypical fibroxanthoma
- Dermatofibroma
- Discoid lupus

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Fixed drug eruption
Fibrous histiocytoma
Blue nevus
Spitz nevus
Juvenile xanthogranuloma
Acne cyst/nodule
Pigmented basal cell carcinoma

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Amelanotic melanoma
multiple)
Neurofibroma
Trichofolliculoma
Basal cell carcinoma
Juvenile xanthogranuloma
Cylindroma
Pilomatrixoma
Epidermoid cyst
Molluscum contagiosum
Nevus sebaceus of Jadassohn
Verruca plana
Lepromatous leprosy
Papular granuloma annulare
Amyloidosis
Fibrous histiocytoma
Keloid/hypertrophic scar
Lupus miliaris disseminatus faceii
Amelanotic melanoma

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- Rhinosporidiosis
- South American blastomycosis
- Phycomycosis (e.g.
Muco
r, others)
- Necrotizing fasciitis
- Noma
- Rhinoscleroma
- Basal cell carcinoma

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- Keratoacanthoma.LIP LESIONS
- Angioedema
- Mucous cyst
- Melkerson-Rosenthal syndrome/Miecher's granuloma
- Cheilitis glandularis (lower lip).

LESIONS OF THE ORAL MUCOSA
- Oral vesicles and bullae
Dermatitis herpetiformis/linear IgA disease
Pemphigus vulgaris/pemphigus vegetans
Benign mucous membrane pemphigoid
Erythema multiforme/Stevens-Johnson
syndrome
Bullous pemphigoid
Epidermolysis bullosa
Hand, foot, and mouth disease
Herpangina
Behçet's syndrome
Herpes simplex

(usually gingival hyperplasia, esp. AML).

TONGUE LESIONS
- Smooth tongue (anemia, vitamin deficiencies)
- Black hairy tongue
- Scrotal tongue
- Geographic tongue (benign migratory glossitis)
- Psoriasis
- Candida
- Histoplasmosis
- Medial rhomboid glossitis

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