Table 1. Differential diagnoses of epidermal cyst en plaque.

Contents	Epidermal cyst	MEP3	Idiopathic calcinosis cutis2	Steatocystoma multiplex4
Peak age	Third and fourth decades	Fourth to seventh decades	Third and fourth decades	Second and third decades
Clinical features	Flesh colored nodule	Firm, white papules (several millimeters) on an erythematous base	Slow-growing yellowish nodules	Firm, yellowish colored papules and nodules
Histology	Lined by stratified squamous cells with keratinous and other materials	Lined by stratified squamous cells with keratinous materials	Deposition of calcium in the dermis without lining	Lined by stratified squamous epithelium containing sebaceous gland
Predilection site	Scalp, Trunk, Face	Retroauricular area	Scrotum	Chest
Lesion numbers	Single to multiple	Multiple	Single to multiple	Multiple
Treatment options	Excision	Excision Topical retinoids	Excision	Excision Laser treatment

MEP: milia en plaque.