Our results support the opinion that the association between psoriasis and MF does exist. It is most possibly related to the chronic lymphocyte stimulation that occurs during psoriasis that eventually leads to a dominant clone and the evolution to CTCL. Our study suggests that apart from cases of early MF, which are being indeed misdiagnosed as psoriasis, there is another group of patients, where psoriasis truly coexists with - or even progresses to - MF.

The widespread use of immune checkpoint inhibitors has shed light to several unusual immune-related adverse effects of the drugs. Severe cutaneous adverse reactions are generally rare with anti-PD1 agents. We present in this paper the case of a 48-year-old patient with melanoma who developed bullous pemphigoid-like skin lesions along with fever, arthralgia and overt eosinophilia following adjuvant treatment with nivolumab. The condition was successfully treated with corticosteroids and a rechallenge with another anti-PD1 agent did not lead to recurrence of the skin lesions. We also reviewed the literature on the epidemiologic, clinical, and histopathologic characteristics of bullous pemphigoid as well as on the treatment and prognosis of this dermatologic condition in patients with melanoma or other malignancies under treatment with immune checkpoint inhibitors.

Patients ≥40 were more likely to report a history of longer sun exposure times, of never using a sunscreen and of having a history of painful sunburn. However, the importance of this observation remains to be elucidated as these patients also presented more commonly with lesions located on non-sun-exposed areas (trunk) and higher naevus/atypical naevus counts.

We report on a 29-year-old primigravida who developed impetigo herpetiformis 1 day after delivery. To our knowledge, this patient is the second reported case of impetigo herpetiformis presenting during the puerperium. The patient responded quickly to systemic administration of methotrexate and prednisolone.

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