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    Bullous scabies, the light shed on etiopathogenesis and treatment: report of five paediatric cases
    (Termedia Publishing House Ltd, 2023) Arslan, Hakan; Gündüz, Özgür
    Introduction: Bullous scabies (BS) is an infrequent and atypical presentation of scabies, with a predilection for el- derly males. The mechanism of BS is not fully understood; superinfection, friction due to pruritus, autoeczemation, direct injury from mite's lytic enzymes, cross-reactivity of scabies protein with basal membrane zone antigens are considered to be possible reasons. Aim: To define clinical features of paediatric BS cases, which is an extremely rare subtype of scabies. Material and methods: This is a retrospective study of paediatric BS cases seen at two tertiary care centres. Previ- ously described bacterial culture, antibiogram and follow-up records were investigated retrospectively. Confirmed scabies cases, according to the International Alliance for the Control of Scabies (IACS) with bullae were included. All cases were treated with 10% sulfur ointment for 3 consecutive days, two cycles. Households of cases were also treated simultaneously. Systemic antibiotics were added to patients with elevated acute phase reactants according to the antibiogram results. Informed consent was obtained from patients' parents. Results: Five BS cases were included. Three cases were male, two cases were female. Four cases had staphylococcus aureus, one had group-A beta haemolytic streptococcus positive bullae culture. All cases achieved a rapid complete resolution of symptoms after topical 10% sulfur ointment. Conclusions: Paediatric BS is an extremely rare entity of scabies. Bacterial superinfection plays a key role in bullae formation. 10% sulfur ointment is a highly effective treatment option for paediatric BS.
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    Effect of the coronavirus disease-2019 pandemic on the follow-up and treatment of patients with rosacea
    (Galenos Publ House, 2023) Durak, Murat; Gündüz, Özgür
    Background and Design: This study aimed to investigate the effects of the precautions and preventive measures implemented during the coronavirus disease-2019 (COVID-19) pandemic on the follow-up and treatment processes of patients with rosacea who applied to the Skin and Venereal Diseases outpatient clinic of a university hospital in Turkiye.Materials and Methods: Age, sex, number of hospital admissions, prescribed topical and systemic treatments, total amount of treatment on a box basis, follow-up interval in multiple applications, and number of applications to the Ophthalmology Department were recorded before and during the COVID-19 pandemic. Results: No difference was found in the age and sex distributions of patients with rosacea who applied to the Skin and Venereal Diseases outpatient clinic during the COVID-19 pandemic compared with that before the pandemic. However, the total number of patients decreased. Furthermore, the total number of drugs prescribed to patients and the number of systemic drugs increased proportionally during the COVID-19 pandemic. In addition, the ratio of patients who continued their follow-up and the use of systemic drugs among these patients increased.Conclusion: In this study, the number of admissions decreased and the rate of patients who needed systemic treatment increased. Rosacea and similar dermatoses that required long-term follow-up could be evaluated via teledermatology during periods when application to outpatient clinics for follow-up becomes difficult such as during pandemics and natural disasters.
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    JAK/STAT pathway modulation: Does it work in dermatology?
    (Wiley, 2019) Gündüz, Özgür
    Janus kinase-signal transducer and activator of transcription (JAK/STAT)-is an intracellular signaling pathway, which plays a key role in downstream transmission of extracellular signals from cell membrane to the cell nucleus. This pathway is activated by cytokines, which participate in inflammation, innate and acquired immune responses, and also cell growth. Recent studies point out possible disturbances in JAK/STAT pathway in various inflammatory and autoimmune skin diseases, such as atopic dermatitis, psoriasis, alopecia areata. Several molecules that modulate-inhibit-this pathway are currently under investigation for the evaluation of their clinical use in dermatological diseases. A brief overview of the therapeutical use of JAK/STAT inhibitors in dermatology will be provided here.
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    Lichen Planus Pigmentosus-Inversus: A Report of Two Cases
    (2019) Demirkan, Serkan; Gündüz, Özgür; Devrim, Tuba
    Lichen planus pigmentosus (LPP)-inversus has been identified in a few East European cases primarily intertriginous areas such as axilla and groin which is not contacting with sunlight, and involvement in other skin areas was rarely detected. Because the lesions are similar to LPP in clinical and histological appearance, this condition, which is characterized by hyperpigmented, brown macules or plaques, is called LPP-inversus. Until today, actinic LP, linear LP, zosteriform, and LP pigmentosus clinical subtypes of lichen planus have been described. LPP-inversus is a rare form of LP and so far, there have been few case reports. LPP-inversus has been reported mostly in Caucasians and Asians, and axilla was the most involved body region. In a small proportion (approximately 10%) of the cases, classical LP or LPP lesions may be located outside the flexural areas. So far, about 50 cases have been reported; also we presented two new cases that we diagnosed.