We herein present a unique patient of Netherton syndrome (NS) with ichthyosis linearis circumflexa (ILC) lesions associated with severe atopic manifestations since infancy, showing different responses of atopic and ILC lesions to a 2‐year dupilumab therapy. The atopic eczematous lesions and pruritus healed remarkably, dramatically improving the patient's quality of life, whilst the scalp hair showed a clinical and light microscopic improvement. The additional recovery in axillary/pubic/extremity hair growth, sweating and nail growth in the presented case was not previously reported in NS patients treated with dupilumab. However, dupilumab had no therapeutic effect on ILC lesions which were not pruritic and showed a treatment‐independent wax and waned course.

Background: Allergic contact dermatitis (ACD) from topical ophthalmic medications (TOMs) poses an additional disease burden to patients who already suffer from eye problems.Objectives: To investigate the epidemiological/clinical profile of patients with periorbital ACD from TOMs in Turkey.Patients and Methods: This was a retrospective, cross-sectional, single tertiary centre study based on files of 75 patch tested patients with suspected periorbital ACD from TOMs among a total of 2801 consecutively patch tested patients with suspected ACD of any origin between 1996 and 2019.Results: Periorbital ACD was diagnosed in 25 of 75 (33.3%) patients (female: male = 1.8:1; age range: 6-85 years) with suspected ACD from TOMs showing an overall prevalence of 0.9% (25/2801) among the whole patch test population.Atopy was not present. Tobramycin-containing TOMs were the most frequent culprits, followed by antiglaucoma preparations. Their frequency increased, whereas no new cases of neomycin-induced ACD were observed after 2011. Positivities with thimerosal were of unknown clinical relevance, while benzalkonium chloride (BAC) caused ACD in two patients. The diagnosis would be missed in each 20% of patients without performing day (D) 4 and D7 readings and strip-patch testing. Ten culprits were identified only by testing with patients' own TOMs in eight (32%) patients.Conclusions: Aminoglycosides, particularly tobramycin, were the leading cause of ACD from TOMs. The frequency of ACD from tobramycin and antiglaucoma medications increased after 2011. BAC was a rare but important allergen. Additional D4 and D7 readings, strip-patch testing, and testing with patients' own TOMs seem essential when patch testing with eye medications.

Objective: To investigate the clinico-epidemiological profile of hidradenitis suppurativa (HS) patients. Material and Method:In this retrospective cross-sectional single tertiary center study, the HS patients diagnosed and/or followed up between 2012-2022 were evaluated regarding demographic features, clinical findings, associated comorbidities, therapies initiated for HS and their outcomes.