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최금하,임재홍,이주형,권근상,이호,박호성,정명자,문우성,은재순,이동근,장규윤 대한병리학회 2008 Journal of Pathology and Translational Medicine Vol.42 No.5
Background : Pseudoepitheliomatous hyperplasia (PEH) is a reactive proliferation of surface epithelium and can be confused with invasive squamous cell carcinoma (SCC) in head and neck biopsy specimens. To distinguish PEH from invasive SCC, immunohistochemical staining for claudin-1, E-cadherin and p53 was performed. Methods : Eighteen cases of PEH and 29 invasive SCC from head and neck lesions were immunostained and examined. Results : The invasive SCC showed increased staining of claudin-1 (p<0.001) and p53 (p<0.001) and decreased staining of E-cadherin (p=0.005) compared to the PEH specimens. The combined score calculated by adding the positive sum of claudin-1 and p53 and subtracting E-cadherin was useful for the differentiation of SCC from PEH (89.7% sensitivity and 88.9% specificity, p<0.001). Conclusions : The combined immunostaining for claudin-1, p53 and E-cadherin may help differentiate PEH from invasive SCC. The results of this study suggest that the increased expression of claudin-1 and p53 and the decreased expression of E-cadherin maybe markers for the aggressive growth of invasive SCC. Background : Pseudoepitheliomatous hyperplasia (PEH) is a reactive proliferation of surface epithelium and can be confused with invasive squamous cell carcinoma (SCC) in head and neck biopsy specimens. To distinguish PEH from invasive SCC, immunohistochemical staining for claudin-1, E-cadherin and p53 was performed. Methods : Eighteen cases of PEH and 29 invasive SCC from head and neck lesions were immunostained and examined. Results : The invasive SCC showed increased staining of claudin-1 (p<0.001) and p53 (p<0.001) and decreased staining of E-cadherin (p=0.005) compared to the PEH specimens. The combined score calculated by adding the positive sum of claudin-1 and p53 and subtracting E-cadherin was useful for the differentiation of SCC from PEH (89.7% sensitivity and 88.9% specificity, p<0.001). Conclusions : The combined immunostaining for claudin-1, p53 and E-cadherin may help differentiate PEH from invasive SCC. The results of this study suggest that the increased expression of claudin-1 and p53 and the decreased expression of E-cadherin maybe markers for the aggressive growth of invasive SCC.
유방암 환자에게서 관찰된 Cytokeratin 탐식 조직구에 의한 감시 림프절의 거짓전이 - 1예 보고 -
최금하,차은정,최하나,문우성 대한병리학회 2007 Journal of Pathology and Translational Medicine Vol.41 No.6
Immunohistochemical staining for cytokeratins can detect false negative nodes in patients with breast carcinoma. We report on a patient with breast carcinoma and pseudometastasis detected by immunohistochemical staining within a negative sentinel lymph node. A 66-year-old woman underwent a simple mastectomy and sentinel lymph node biopsy. Immunohistochemical staining of the sentinel nodes for cytokeratin in permanent sections showed cells with intense cytoplasmic staining in the subcapsular sinus. The cells were negative for epithelial membrane antigen staining, but positive for CD68. In combination with morphologic findings and immunohistochemistry, cytokeratin-positive cells were confirmed as histiocytes with phagocytized cytokeratin debris. Careful correlation with histology and additional IHC could help avoid a misinterpretation of this type of pseudometastasis.
An Unusual Presentation of a Solid Pseudopapillary Tumor of the Pancreas Mimicking Adenocarcinoma
전형구,최금하,Taehyeon Kim 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.5
Solid pseudopapillary tumors of the pancreas are rare and typically occur in young women. Compared with pancreatic adenocarcinoma,solid pseudopapillary tumors are characterized by notable indolent biological behavior associated with a favorable prognosis. Despitetheir large size, these tumors rarely metastasize. Even in cases of hepatic metastasis, most lesions are usually solitary in distributionand are amenable to resection. We report a case of a 55-year-old man with a small solid pseudopapillary tumor (≤3-cm diameter)mimicking a pancreatic adenocarcinoma, with multiple hepatic metastases. The diagnosis was confirmed by endoscopic ultrasoundguided fine-needle biopsy using a 22-G core needle. Unfortunately, rapid tumor progression led to patient mortality 5 months afterdiagnosis. To our knowledge, this is the first case report that describes a small solid pseudopapillary tumor of the pancreas with multiplehepatic metastasis and poor prognosis in a patient who was diagnosed with this condition at the time of initial diagnosis.
비용을 동반한 환자에서 발생한 비강 및 비중격 그리고 비인두에서의 다발성 골수외 형질세포종 1예
이재훈,최금하 대한비과학회 2013 Journal of rhinology Vol.20 No.1
Plasmacytomas can present as either medullary or extramedullary neoplasms. Extramedullary plasmacytomas (EMPs) are rare tumors, accounting for approximately 1% of all head and neck malignancies. EMPs most commonly present as a solitary lesion, with multiple sites involved in only approximately 10% of cases. The authors report a case of a patient presenting with a history of nasal obstruction and nasal bleeding and who was found to have multiple EMPs of the nasal cavity accompanied by nasal polyps.
Acinic Cell Carcinoma of the Palatine Tonsil - A Brief Case Report -
김헌수,최금하 대한병리학회 2010 Journal of Pathology and Translational Medicine Vol.44 No.4
Acinic cell carcinoma (ACC) is a rare, low-grade malignancy of the salivary glands. Most cases occur in the major salivary glands, especially the parotid gland, with only a few cases involving the minor salivary gland previously described. A 67-year-old male patient was admitted complaining of an obstructive feeling in the throat. On examination, a lobulated mass in the tonsillar surface was noticed. Tonsillectomy was performed under general anesthesia. Histopathological examination of the mass revealed sheets of large, polygonal acinar cells with granular, slightly basophilic cytoplasm, which led to the diagnosis of ACC. Here, we present a case of low-grade ACC of the palatine tonsil, which we believe to be the first reported case of ACC in this location.
제1형 신경섬유종증에 동반된 청소년기 모양세포성 성상세포종의 악성 전환 1례
엄기성,최금하,김태영 대한소아신경학회 2011 대한소아신경학회지 Vol.19 No.3
Pilocytic astrocytoma (PA) is a World Health Organization (WHO) grade I tumor typically affecting children and young adults. In general, surgical resection for PA is thought to be curative, and tumor recurrence or malignant transformation is relatively rare. Herein, we report an extremely rare case of a malignant transformation of PA. Five years prior, the patient underwent subtotal resection for PA in the left suprasellar area and left side brain parenchyma of the third ventricle, followed by gamma knife radiosurgery for remnants of the tumor. Four years after surgery, recurrent PA developed, and surgery was performed through an anterior interhemispheric transcallosal approach. One year after surgery, a rapidly growing tumor in the left basal ganglia and hypothalamus was discovered, and subtotal removal was performed. The histological diagnosis was glioblastoma. To the best of our knowledge, malignant transformation of PA has not been reported in Korea. Through review of the literature, we found malignant transformation to be limited solely to patients treated with radiotherapy, which is an observation that should be validated in future studies. PA는 소아에서 가장 흔한 두개내종양으로 성장 속도가 느리고 경계가 명확하며 수술적 치료로 대단히 양호한 예후를 가지는 것으로 알려져 있다. PA의 악성 전환은 대단히 드문 경우로 국내에서는 아직 보고된 바가 없다. 저자들은 NF-1이 동반된 19세 여자 환자에서 PA 진단 약 5년 뒤 교모세포종으로 악성 전환을 보인 환자를 경험하였고 문헌고찰을 통해 볼 때 PA에 대한 방사선 조사가 악성 전환의 한 원인이었을 것으로 사료된다.
외이도에 발생한 이구선 다형선종: 2증례보고 및 문헌고찰
정주용,이담호,최금하 대한이비인후과학회 2017 대한이비인후과학회지 두경부외과학 Vol.60 No.4
Ceruminous glands are specialized apocrine glands located in the external auditory canal (EAC). Pleomorphic adenoma (PA) of the EAC is derived from these ceruminous glands. Tumors arising from these ceruminous glands are rare. Furthermore, ceruminous PA of the EAC is extremely rare. About 35 cases have been reported to date in the English literature, and only 4 cases have been reported in Korea. There are several controversial issues about these rare tumors such as nomenclature, histogenesis and classification. We report here on two cases of ceruminous PA and review the cases in the Korean literature. Korean J Otorhinolaryngol-Head Neck Surg 2017;60(4):191-5