This was a retrospective study with a limited number of patients. In the absence of confirmatory genetic testing and family history of the disease, dark-brown scale of the extensor surfaces and the absence of palmoplantar hyperlinearity appear to be the most reliable clinical findings supporting a diagnosis of XLI. Dermatologists should be aware of the high prevalence of ADHD and epilepsy in patients with nonsyndromic XLI.

Dermatosis characterized by tissue eosinophilia arising in the context of hematologic disease is known as eosinophilic dermatosis of hematologic malignancy. The most commonly associated malignancy is chronic lymphocytic leukemia. Eosinophilic dermatosis of hematologic malignancy is a rare condition with a wide variety of clinical presentations, ranging from papules, erythematous nodules, or blisters that simulate arthropod bites, to the formation of true plaques of differing sizes. Histology reveals the presence of abundant eosinophils. We present 4 new cases seen in Hospital Arnau de Vilanova, Valencia, during the past 7 years. Three of these cases were associated with chronic lymphocytic leukemia and 1 with mycosis fungoides. It is important to recognize this dermatosis as it can indicate progression of the underlying disease, as was the case in 3 of our patients.

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Omalizumab is a monoclonal anti-IgE antibody approved for the treatment of severe allergic asthma. There is increasing evidence in the literature of its usefulness in chronic urticaria. Herein, we report a retrospective case series of 15 patients with chronic idiopathic urticaria treated with omalizumab. We reviewed their medical records to assess the improvement achieved after 3 and 6 months of treatment. Complete response was defined as symptom disappearance that could be followed by discontinuation of antihistamines, and partial response as symptom improvement, but with symptom worsening when attempting to discontinue antihistamines. After 3 months of treatment, 12 patients responded, with partial response in 9 and complete response in 3. At 6 months, 8 of 10 patients continuing on omalizumab had a complete response and 2 a partial response. The results of the present retrospective series show the effectiveness of omalizumab in most treated patients, which is consistent with other recently published series and studies. These data support its role in the management of patients with chronic urticaria refractory to conventional treatments.

We report on a child with a divided or kissing nevus of the penis with benign symmetric globular pattern on dermoscopic examination that evolved into a globular-reticular pattern after 1 year of follow-up. Divided nevus of the penis is exceedingly rare, with only four cases with dermoscopic findings reported to date. Dermoscopy seems to be useful when deciding on the most appropriate management of these cases.