The role of IFIH1 gene rs1990760 and rs2111485 single-nucleotide polymorphisms in generalized vitiligo predisposition

Background/aim: Interferon-induced helicase (IFIH1) is a gene locus that has been recently defined as a candidate for susceptibility to generalized vitiligo (GV). The objectives of this study were to assess the association of IFIH1 gene, rs2111485, and rs1990760 single-nucleotide polymorphisms (SNP) with susceptibility to GV and the autoimmune diseases accompanying GV. Materials and methods: We prospectively studied GV patients and frequency-matched healthy controls by age and sex. The genotypes of the participants were determined for rs1990760 and rs2111485 SNPs of IFIH1. Dominant, recessive, and additive models were evaluated for each SNP adjusted for age and sex. Results: The patients and their controls were observed to be in the Hardy­Weinberg equilibrium for SNP1 (2q24.2, rs1990760, IFIH1, T/C) and SNP2 (2q24.2, rs2111485, IFIH1, G/A), respectively (all P > 0.7). For SNP1, every T allel addition was significantly associated with 1.53 times protectiveness in terms of vitiligo risk (P = 0.033). As for SNP2, every G allel addition was associated with 1.42 times protectiveness, close to statistical significance (P = 0.100). Conclusions: We detected that for SNP1, each T allel and for SNP2, each G allel are protective in terms of vitiligo development. Hereby, we confirmed that IFIH1 gene locus has a role in GV susceptibility.

A case of generalized allergic contact dermatitis after laser tattoo removal.

Tattoos are popular body decorations mainly done for cosmetic purposes. Regarded as a form of self-expression, tattoos reflect the character of the person wearing it. However, as tatoos are persistent visual markings on the body, frequently misperceived by the others causing tattooed to seek removal. Today most of the tattoos can be successfully treated with laser ablation. Here we present a case of generalized allergic contact dermatitis after laser tattoo removal which is a rare adverse reaction of laser tattoo removal.

Comparison of Optical Coherence Tomography Angiography Findings in Patients with Behçet's Disease and Healthy Controls.

PURPOSE: To investigate optical coherence tomography angiography (OCTA) findings in patients with Behçet's disease (BD). METHODS: Ninety-four eyes of 49 patients with BD and 53 eyes of 53 healthy subjects were included. Vascular density (VD), foveal avascular zone (FAZ) area, perifoveal capillary hypoperfusion, perifoveal capillary network disorganization, and FAZ irregularity were analyzed. RESULTS: OCTA revealed retinal VD reduction and higher perifoveal capillary hypoperfusion, perifoveal capillary network disorganization and FAZ irregularity in ocular Behçet's compared to nonocular Behçet's (p = .000). However, compared to normal eyes, there was no difference between any OCTA measurements in nonocular BD patients. The mean area of FAZ was not different in any group (p = .266). In ocular Behçet, visual acuity was inversely correlated with FAZ area and FAZ irregularity. CONCLUSION: Retinal VD decreases and perifoveal microvascular network changes in ocular Behçet's. FAZ irregularity may be a more valuable marker than FAZ area for indicating ocular involvement.

Dermoscopic Findings in Patients with Pigmented Purpuric Dermatoses.

Pigmented purpuric dermatoses (PPD) are a group of chronic and relapsing cutaneous disorders characterized by a distinct purpuric rash. The diagnosis is made with clinical and histopathological findings. Dermoscopy has rarely been used in the diagnosis of PPD. The aim of our study is to describe the dermoscopic findings in patients with PPD. Eighteen patients who were clinically and histopathologically diagnosed with PPD were studied prospectively. The type and duration of PPD, associated diseases, and medication history of the patients were noted. Dermoscopic examination was performed in all of the patients. Four of the patients were women and 14 of them were men. 16 (88.8%) of them had Shamberg's disease, 1 of them had lichen aureus, and 1 had purpura annularis telangiectoides. Dermoscopic examination revealed multiple irregular red dots, globules and/or patches and brown-coppery coloration on the background in all of the patients, a network of interconnected brown lines in 8, linear vessels in 9, brown dots in 3, grey dots in 3, twisted red loops in 5, comma-like vessels in 2, and red lacunae in 1 patient. The dermoscopic examination of PPD might improve the accuracy of clinical diagnosis.

Evaluation of the gastrointestinal findings of nodulocystic acnepatients during systemic isotretinoin therapy.

BACKGROUND/AIM: Systemic isotretinoin treatment is an effective treatment modality for nodulocystic acne, the clinical use of which has been associated with reports of adverse events. We conducted a prospective study with the aim of determining the possible gastrointestinal and laboratory findings of nodulocystic acne patients during systemic isotretinoin treatment. MATERIALS AND METHODS: Seventy patients with nodulocystic acne completed the study. During the monthly follow-up visits, liver function tests and lipid profiles of the patients were evaluated and gastrointestinal system complaints were examined. RESULTS: We recorded a significant elevation in liver function tests and lipid profiles of the patients, the most prominent elevation being in plasma triglyceride concentrations. We observed that nausea, dyspepsia, abdominal pain, and diarrhea were the rare gastrointestinal symptoms encountered during systemic isotretinoin therapy. Constipation and anorectal bleeding were relatively more common symptoms and there seemed to be a relation between these two symptoms. CONCLUSION: Our study is the first to analyze the gastrointestinal findings of patients during systemic isotretinoin treatment. Dermatologists and gastroenterologists must keep in mind that, as well as known laboratory findings like hypertriglyceridemia and elevated liver function tests, systemic isotretinoin therapy may also cause significant clinical gastrointestinal findings.

Mycosis fungoides mimicking nevoid hyperkeratosis of the nipple and areola in an adolescent.

Mycosis fungoides is one of the great imitators in dermatology; it can mimic many dermatoses. Nevoid hyperkeratosis of the nipple and areola is a rare idiopathic disease with typical clinical features of verrucous thickening and brownish discoloration of the nipple, areola or both. Here, a 16-year-old male patient with mycosis fungoides mimicking nevoid hyperkeratosis of the nipple and areola has been reported. To our knowledge, this is the first atypical MF patient to have presented with a NHNA-like lesion. Although the clinical appearance of nevoid hyperkeratosis of the nipple and areola is highly characteristic for diagnosis, histopathological examination is recommended, especially in cases with atypical features such as unexpected age, male gender and unilateral location.