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Chondroid syringoma (mixed tumor) with calcification on hand
( Ji Hyuck Hong ),( Min Seok Ham ),( Dae Yeon Kim ),( Dong Won Lee ),( Hyo Hyun Ahn ),( Young Chul Kye ),( Soo Hong Seo ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.1
Chondroid syringoma (mixed tumor of the skin) is a rare, benign neoplasm composed of epithelium and mesenchyme.1 It usually presents with slowly growing, asymptomatic firm nodule on the head and neck area. Microscopically, it shows epithelial ducts and tubules in a myxoid-cartilaginous stroma. There are two types according to the origin: apocrine type and eccrine type. The former type usually shows branching lumina and the latter type shows small tubular lumina.2 A 66-year-old male presented with an asymptomatic 1.5 x 1.5 sized firm nodule on right finger of 5 years’ of duration. His clinical history did not show significant information. Excisional biopsy was done with an impression of epidermal cyst. Histopathology of the specimen showed dilated tubules embedded in the myxoid-cartilaginous stroma. The dilated tubules were lined by single inner cuboidal cells and this point explained that the lesion was originated from the eccrine gland. Also, tubules showed cystic change and were filled with calcification, which was atypical feature of this lesion. According to the literature, calcifications are more commonly present in eccrine type chondroid syringoma than apocrine type.3 Additional treatment was not needed. Herein, we report a rare case of chondroid syringoma with calcification developed on hand, which is the uncommon site of the tumor.
( Ji Hyuck Hong ),( Sung Jin Park ),( Min Seok Ham ),( Dae Yeon Kim ),( Soo Hong Seo ),( Yeong Chul Kye ),( Hyo Hyun Ahn ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Rosacea is common chronic inflammatory skin disease, mainly affecting face. Subtypes of rosacea include erythematotelangiectatic (ETR), papulopustular(PPR), phymatous and ocular types. And there is an another subtype: rosacea fulminans, which is not included in National Rosacea Society. It is a rare subtype characterised by rapid onset and fulminant course. Appropriate treatments are required in rosacea fulminans. Unless, it leaves pitted and fibrotic scars. 46-year-old female patient complained of persistent erythematous papules and pustules on face. She had any other underlying disease and had been treated unregularly by various clinics including oriental medicine for about 6 months. We diagnosed PPR and started treatment with doxycycline 100 mg per day and topical ivermectin, clindamycin, metronidazole. After 6 months of treatment, erythema was improved leaving remnant tiny depressed scars. We added topical retinoids to improve scars for 3 months. Scars were slowly improved by the treatments. Our case present remnant scars produced by mild to moderate grade of PPR type of rosacea. According to the literature, subclinical fibrotic changes can occur in rosacea while the disease persists. The fibrosis in rosacea is on-going process along with the inflammation.3 So, under-treatment of PPR may result scarring as in rosacea fulminans. Herein, we report a case showing scarring caused by mild to moderate grade of PPR type rosacea.
Syringocystadenoma papilliferum on the external auditory meatus
( Ji Hyuck Hong ),( Min Seok Ham ),( Dae Yeon Kim ),( Dong Won Lee ),( Young Chul Kye ),( Hyo Hyun Ahn ),( Soo Hong Seo ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.1
Syringocystadenoma papilliferum is a rare, benign adnexal neoplasm originated from apocrine or eccrine glands.1 It usually develops on head and neck area, most commonly on scalp, in young adults presented with an asymptomatic solitary pink papule.2 The external auditory canal is uncommon site of syringocystadenoma papilliferum. The lesion can become papillated or hyperkeratotic. Histopathologically, it shows papillomatous epidermal invaginations lined with basilar cuboidal cells and columnar secretory cells. Diagnosis is determined by confirming the characteristic histologic feature. A 18-year-old female presented with an asymptomatic flesh colored papule in right external auditory meatus. She had a history of asthma. The lesion had been treated with laser in other dermatologic clinic 2 years ago and was recurred. The sign of inflammation was not seen. Excisional biopsy was done with an impression of nevus sebaceous. Histopathology of the specimen showed papillomatous glandular invaginated epithelium lined with dual cell population: inner cuboidal and outer columnar cells. These inner columnar cells showed a decapitation secretion, which is characteristic feature of apocrine gland. Also, the characteristic plasma cell-rich stroma was seen. The lesion was excised completely and additional treatment was not needed. Herein, we report a rare case of syringocystadenoma papilliferum on atypical site, the external auditory meatus.
Ham, Sun-Young,Cho, Se-Jin,Lee, Ung-Ki,Jeon, So-Yeon,Shin, Ji-Cheol,Myung, No-Seung,Paeng, Ki-Jung The Korean Electrochemical Society 2007 한국전기화학회지 Vol.10 No.4
This paper describes a two-step approach for the electrochemical deposition of CdZnS thin films on the polycrystalline Au electrode. Initially, an Au substrate is electrochemically modified with a sulfur layer. In the second step, the layer is electroreduced to $S^{2-}$ in the electrolyte dosed with the requisite amount of $Cd^{2+}$ and $Zn^{2+}$ ions to generate CdZnS films in situ. This approach was validated using a combination of linear sweep voltammetry and electrochemical quartz crystal microgravimetry. Thus synthesized CdZnS thin films have different composition depending on the composition of electrolytes. CdZnS thin films are characterized by energy-dispersive X-ray analysis and Raman spectroscopy.
Neurotological Findings in a Patient with Glufosinate Ammonium Intoxication
Ji Young Kim,Joo Yeon Ham,Seong-Hae Jeong 대한평형의학회 2020 Research in Vestibular Science Vol.19 No.4
The upward deviation could be explained by loss of inhibitory inputs from the cerebellum onto the brainstem anterior semicircular canal projections for upward vestibulo-ocular reflex, which would lead to an upward bias in static eye position. Therefore, upward gaze deviation has been reported in comatose patients after resuscitation and diffuse cerebrocerebellar damage sparing the brainstem. Herein, we report a patient with ingestion of glufosinate ammonium presented with cerebellar ataxia and ocular motor findings suggestive of cerebellum involvement such as upward gaze tendency, spontaneous downbeat, gaze-evoked nystagmus, perverted head impulse test, and impaired smooth pursuit.