Diagnosis of<unk>  is made based on microscopic examination of stratum corneum skin scrapings obtained by using a scalpel. The scrapings are mixed with potassium hydroxide (KOH). The KOH lyses the nonfungal debris. The skin scrapings are cultured on Sabouraud's agar at 25°C and allowed to grow for about a week. H. werneckii can generally be distinguished due to its two-celled yeast form and the presence of septate hyphae with thick, darkly pigmented walls.
Tinea nigra
Lichen striatus
Cutis marmorata
Linea alba 
Xanthelasma
Ellipta
Onychophosis
Tinea imbricata