Joohyung Youh

Paradoxical development of prurigo nodularis during ixekizumab therapy in a patient with generalized pustular psoriasis and psoriatic arthritis

Joohyung Youh, Takuya Mizukami, Yuri Nagata, Kei K. Ito et autres

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Lichen planus pigmentosus inversus presenting with clinical features mimicking acanthosis nigricans

Joohyung Youh, Hiroaki Iwata, Shinya Kitamura, Hideyuki Ujiie

Lichen planus pigmentosus (LPP) is recognized as a rare variant of lichen planus, characterized by dermal hyperpigmentation. Specifically, a particular intertriginous variant of LPP is known as lichen planus pigmentosus inversus (LPPI). In our case, the patient presented with symmetric, hyperpigmented dark …

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Centrifugally Spreading Annular Erythema as a Dermatological Indicator of Metastatic Breast Carcinoma

Joohyung Youh, Yasuyuki Yamaguchi, Etsuo Hiraguchi

Breast cancer is the leading cause of skin metastasis in women with internal malignancies. This report highlights an atypical case of cutaneous metastasis of breast cancer (CMBC) in a 66-year-old woman. Starting four months before her dermatology consultation, the patient underwent a …

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A Case of Generalized Granuloma Annulare Induced by Intravesical Bacillus Calmette–Guerin Immunotherapy

Joohyung Youh, Yasuyuki Yamaguchi, Mayuna Shimano, Moeko Hotta

Sir, Granuloma annulare (GA) is a benign, self-limiting disorder that is characterised by small papules with an annular distribution. Generalised GA (GGA) occurs in about 15% of GA cases and affects the trunk and extremities. It consists of multiple papules with or …

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Dose-dependent, non-pigmenting fixed drug eruption with eczematous lesions induced by bosutinib: case report

Yasuyuki Yamaguchi, Joohyung Youh, Tsugumichi Kawamura, Daichi Hoshina

Bosutinib, widely used as a primary treatment for chronic myeloid leukemia (CML), is known to frequently cause cutaneous drug eruptions. Fixed Drug Eruption (FDE) is common, typically presenting as recurrent lesions that heal with residual hyperpigmentation. Diagnosing FDE, especially Non-Pigmenting Fixed Drug …

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Apremilast for lithium-associated psoriasis

Joohyung Youh, Hajime Miyazawa, Hiroaki Iwata, Ken Natsuga et autres

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Macrolide/fluoroquinolone‐resistant Campylobacter jejuni ‐induced cellulitis in a patient with X‐linked agammaglobulinaemia successfully treated with carbapenem

Joohyung Youh, Keisuke Imafuku, Teruki Yanagi, Sho Nakakubo et autres

This is a case report and review of the literature; thus, no data are associated with this article. If readers want to know detailed information of this case, we will share clinical information of this case (by e-mail).

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Comparison of Electroencephalography (EEG) Coherence between Major Depressive Disorder (MDD) without Comorbidity and MDD Comorbid with Internet Gaming Disorder

Joohyung Youh, Ji Sun Hong, Doug Hyun Han, Un‐Sun Chung et autres

Internet gaming disorder (IGD) has many comorbid psychiatric problems including major depressive disorder (MDD). In the present study, we compared the neurobiological differences between MDD without comorbidity (MDD-only) and MDD comorbid with IGD (MDD+IGD) by analyzing the quantitative electroencephalogram (QEEG) findings. We …

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