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    Does Systemic Isotretinoin Treatment Constitute a Predisposition to Allergic Sensitization?
    (NLM (Medline), 2021) Cenk H.; Kapicioglu Y.; Yologlu S.
    13-cis-retinoic acid (13-cRA) is a safe treatment for severe acne, as it has immunomodulatory effects such as enhancing the antigen-presenting activity of epidermal Langerhans cells (LCs) and T-cell activity. The aim of this study was to prospectively show the alteration of sensitization and irritation reactions in acne patients undergoing 13-cRA therapy. This cross-sectional descriptive study consisted of 65 severe to refractory acne patients. The standard thin-layer rapid-use epicutaneous test (T.R.U.E. test) was used to screen sensitization and irritation reactions before and after 3-month 13-cRA treatment. Patch test results after 13-cRA therapy revealed an increase in newly formed sensitization and irritation reactions. Sensitization rate was significantly higher (43.1%) in the second patch test, when compared with the first patch test results (27.7%; P = 0.002). No statistical difference was found in irritation rates. In this study, the sensitization rate was higher after treatment, which could be attributed to the greater antigen penetration due to the disrupted barrier and/or the upregulation of antigen-presenting activity in LC. This would cause a more prominent immune reaction to antigens. Based on these findings, we suggest that 13-cRA may have a sensitization effect, and physicians should be aware of this complication due to 13-cRA treatment. (SKINmed. 2021;19:-0).
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    Recurrent angiolymphoid hyperplasia with eosinophilia during several pregnancies
    (Dermatology Online Journal, 2020) Cenk H.; Kapicioglu Y.; Sarac G.; Sener S.; Sahin N.
    Angiolymphoid hyperplasia with eosinophilia (ALHE) is a rare, benign vascular tumor. Although its etiology is not clearly known, infection, hormonal factors, and trauma are the suspected reasons. There are few cases considered to be related to pregnancy described in the literature. Granulomas are rarely seen in the histopathology and only four patients with granulomas have been described. Herein, we will present a 28-year-old woman who has been pregnant three times; in every pregnancy, she developed pink nodular lesions on the back of her ear. In the first two pregnancies, the lesions had appeared during the pregnancy and regressed completely in the postpartum period. In her third pregnancy, the condition emerged again and lasted 1.5 years after birth of her child. Histopathology exhibited ALHE with granulomas. Although the relationship between ALHE and pregnancy is already known, there are few cutaneous ALHE cases associated with pregnancy reported in the literature. This association is further supported by this case having recurrent ALHE during each pregnancy period. Also, the presence of naked granuloma in histopathology, unlike most of the cases, contributes to the current histopathological data. © 2020 Dermatology Online Journal. All rights reserved.