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A case of HIV-associated psoriasis successfully treated with acitretin
( Haneul Oh ),( Jae Yeong Jeong ),( Tae Jun Park ),( Bo Young Kim ),( Hwa Jung Ryu ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
HIV-associated Psoriasis is more severe, tends to be non-responsive to treatment, and has more limitations on treatment options. However, reports on HIV-associated psoriasis are very rare in Korea. A 22-year-old male patient with a history of three years of HIV infection visited our dermatology clinic because of psoriasis exacerbations. He was diagnosed with psoriasis two years ago and was well controlled with topical steroid/calcipotriol ointment. But skin lesions recently worsened without the decrease in CD4 T-cell count and responded poorly to therapy with a topical ointment. He was on antiretroviral therapy without change, had 391 cells/mm3 of CD4 T-cell count. Because of the impaired immunological status of the patient, acitretin 20 mg daily was started as initial treatment instead of traditional severe psoriasis treatment such as MTX, Cyclosporin. When he visited our clinic a month later, most of the scales and papuloerythematous skin lesions had disappeared. Acitretin 20 mg daily was continued for 2 more months and the patient has not experienced relapse until now. HIV-associated psoriasis is a condition that requires careful treatment selection, because of the high risk of worsening the conditions of an already impaired immune system existing in these patients. we hearin report a case of HIV-associated psoriasis successfully treated with acitretin
Clinico-dermoscopic features of atypical dermatofibroma
( Haneul Oh ),( Byeong Geun Park ),( Jae Yeong Jeong ),( Tae Jun Park ),( Hwa Jung Ryu ),( Il-hwan Kim ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1
Background: Dermatofibroma is a common benign skin neoplasm that is usually easy to recognize, but in some cases its differentiation from atypical dermatofibroma may be difficult. Dermoscopy, which is widely used in recent years, may be helpful in early detection of atypical dermatofibroma. Objectives: To describe the clinical and dermoscopic features of atypical dermatofibroma and to differentiate from typical type. Methods: We retrospectively searched the database of patients from Department of Dermatology, Korea University Ansan Hospital from 2010 to 2019, who had skin biopsy or excision operation with the resulting pathology report of typical and atypical dermatofibroma. Results: Of the 220 patients diagnosed with dermatofibroma, 20 (9.1%) cases were identified as atypical deramtofibroma. In comparison of clinical features, the atypical type was not significantly different from the typical type. However, dermoscopy findings of atypical dermatofibroma showed several distinct features. Peripheral homogeneous pigmentation and central white network pattern was the most common finding, which is only found in 6% of the typical dermatofibroma. Conclusion: Atypical dermatofibroma is clinically difficult to distinguish from the typical counterpart and biopsy is essential for diagnosis. If dermatofibroma is suspected and exhibits uncommon dermoscopy findings, it may be an atypical type and should be treated with caution when treating because of the tendency to recur and metastasis.
A case of primary cutaneous perivascular epithelioid cell tumor (PEComa)
( Haneul Oh ),( Jae Yeong Jeong ),( Sook In Ryu ),( Bo Young Kim ),( Hye Rim Moon ),( Il-hwan Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Primary cutaneous perivascular epithelioid cell tumors (PEComa) are rare, recently described mesenchymal tumors composed of perivascular epithelioid cells. These rare tumors are characterized by the co-expression of melanocytic and muscle markers. A 66-year-old female was referred to our dermatology clinic because of a suspected clear cell neoplasm in excisional biopsy performed at local clinic. According to the patient, the lesion was a 1 cm-sized asymptomatic nodule on her right knee. On histopathological examination, the tumor was a dermal tumor composed of nests of epithelioid cells exhibiting clear cytoplasm and showed involvement of resection margins. In immunohistochemistry, tumor cells were positive for HMB-45, Vimentin and CD-10. These clinical and histological findings were consistent with a diagnosis of primary cutaneous PEComa. Because of the marginal positive lesion, additional excision was performed and no lesion remained in the pathologic report. After a complete excision, the patient has not experienced relapse until now. We herein reported a rare case of primary cutaneous PEComa in a 66-year-old female with diagnosis based on clinical and histologic findings. This case indicated primary cutaneous PEComa is rare but could occur and mimic other cutaneous tumors including clear cell fibrous histiocytoma, claear cell sarcoma and melanocytic neoplasms with balloon cell change.
Microscale BTS sculptured by electron beam
Choi, Haneul,Jeong, Young Woo,Chang, Hye Jung Korean Society of Microscopy 2019 Applied microscopy Vol.49 No.0
We applied the advanced bitmap-assisted patterning function of focused ion beam to fabricate microscale sculpture of the 'BangTanSoNyeonDan' known as BTS members, the world-wide famous K-pop boyband. With the help of an electron microscope, you can carve your idols on your accessories at micro scale. Fun applications of electron microscopes are not limited to science.