inumab for moderate-to-severe head and neck psoriasis over 52 weeks: pooled analysis of four phase 3 studies. Dermatol Ther (Heidelb) 2016; 6: 627-638. 9 Bagel J, Duffin KC, Moore A et al. The effect of secukinumab on moderate-to-severe scalp psoriasis: Results of a 24-week, randomized, doubleblind, placebo-controlled phase 3b study.
Cutaneous infections with <i>Nannizzia gypsea</i> in Switzerland are very rare (only about 0.2% of all dermatophyte infections). We present the case of an impressive tinea profunda on the upper arm of a 53-year-old woman. In our patient, the source of infection was probably the sand and soil at a Swiss lake. This case report shows the importance of a correct diagnostic workup, as the infection can mimic an inflammatory dermatosis like psoriasis or eczema and thus lead to a diagnostic and therapeutic delay.
Collision tumors consisting of melanoma and squamous cell carcinoma are very rare. We present the case of a deceptive hyperkeratotic nodule on the forearm of a 72-year-old woman, which clinically appeared to be a squamous cell carcinoma, keratoacanthoma type. Histological examination surprisingly revealed a coexisting epithelioid melanoma. Thus, this case report shows the importance of an early histopathological and immunohistochemical workup to prevent unnecessary diagnostic and therapeutic delay with negative effects on prognosis.
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