- Gliosarcoma with Components of Anaplastic Oligodendroglioma and Unclassifiable Spindle Cells: A Case Report.
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Jung Woo Choi, Youngseok Lee, Jung Suk An, Nam Hee Won, Yong Gu Chung, Yang Seok Chae
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Korean J Pathol. 2008;42(1):45-49.
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- Gliosarcoma is a distinct disease entity that is characterized by a biphasic tissue pattern with alternating areas displaying glial and mesenchymal differentiation. The tumor in our case was a rare morphologic variant of gliosarcoma with components of anaplastic oligodendroglioma and unclassifiable spindle cells. Spindle cells showed CD34 and S-100 protein immunoreactivity, which was possibly related to peripheral nerve sheath differentiation. This unique feature has not been described previously and so this case expands the spectrum of possible divergent mesenchymal differentiation, and it lends support to pluripotential stem cells being the origin of this tumor.
- Follicular Lymphoma with Monoclonal Plasma Cell Differentiation: A Case Report.
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Hyun chul Kim, Young Seok Lee, Jung woo Choi, Ae ree Kim, Bom Woo Yeom, Han kyeom Kim, In sun Kim
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Korean J Pathol. 2006;40(2):151-155.
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- We present a case of recurrent follicular lymphoma with an extensive plasma cell component involving infra-auricular lymph nodes in a 64 year-old woman. Immunohistochemical staining showed a strongly positive reaction of the follicles with CD20, bcl-2, bcl-6, CD10 and CD21 on the first biopsy specimen. The intrafollicular and interfollicular plasma cells showed monoclonality for IgG heavy chain and lambda light chain. The histological and immunohistochemical findings in the recurrent tumor were identical with those of the original. Discussion is focused on the importance of the differential diagnosis between reactive lymphoid hyperplasia and other lymphomas having plasmacytic differentiation.
- Micropapillary Variant of Urothelial Carcinoma of the Urinary Bladder: Report of a Case with Cytologic Diagnosis in Urine Specimen.
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Young Seok Lee, Hyunjoo Lee, Jung Woo Choi, Bongkyung Shin, Hankyem Kim, Insun Kim, Aeree Kim
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Korean J Cytopathol. 2006;17(1):46-50.
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- A micropapillary variant of urothelial carcinoma (MPC) is a distinct entity with an aggressive clinical course. It has a micropapillary configuration resembling that of ovarian papillary serous carcinoma. Its cytologic features have rarely been reported. We report a case of MPC detected by urine cytology. A woman aged 93 years presented with a chief complaint of macroscopic hematuria. Cytology of her voided urine showed clusters of malignant cells in a micropapillary configuration. Each tumor cell had a vacuolated cytoplasm, a high nuclear:cytoplasmic ratio, and irregular hyperchromatic nuclei. An ureteroscopic examination revealed exophytic sessile papillary masses extending from the left lateral wall to the anterolateral wall of the urinary bladder. A transurethral resection of the tumor was carried out. The tumor was characterized by delicate papillae with a thin, well-developed fibrovascular stromal core and numerous secondary micropapillae lined with small cuboidal cells containing uniform low- to intermediate-grade nuclei and occasional intracytoplasmic mucinous inclusions. These tumor cells infiltrated the muscle layers of the bladder, and lymphatic tumor emboli were frequently seen. Recognizing that the presence of MPC components in urinary cytology is important for distinguishing this lesion from low-grade papillary lesions and high-grade urothelial carcinomas can result in early detection and earlier treatment for an improved treatment outcome.
- Management and Ethics of Biobank; Biorepository.
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Bong Kyung Shin, Jung Woo Choi, Hyunjuu Lee, Aree Kim, Insun Kim, Han Kyeom Kim
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Korean J Pathol. 2005;39(6):372-378.
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- Research access to a large number of high-quality biospecimen, adequately annotated and ethically acquired, is critical to an improved understanding of disease and ultimately new development of effective diagnostic markers and therapeutic targets. Therefore, the importance of biobanking is widely recognized within the life science and healthcare communities. Resolution of the ethical issues, including informed consent, confidentiality and institutional review board approval, are probably the most important task to every biobank or biorepository. In Korea, the new, very strict ethical act on research, issued in 2005, requires researchers as well as biorepositories to know how they use or run a biorepository ethically without damaging the right of human subjects who gave the repository their biospecimen.
- Liposclerosing Myxofibrous Tumor in Tibia: A Case Report and Review of the Literature.
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Jung Woo Choi, Young Seok Lee, Ju Han Lee, Han Kyeom Kim, Bom Woo Yeom, Jong Sang Choi, Hong Chul Lim, Chul Hwan Kim
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Korean J Pathol. 2005;39(3):207-210.
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- Liposclerosing myxofibrous tumor (LSMFT) is a benign fibro-osseous lesion that is characterized by a complex mixture of histologic elements, including its fibrous dysplasia-like features and its lipoma, myxofibroma, xanthoma and pseudo-Paget's bone patterns. However, this lesion is considered by some researchers as a variant of fibrous dysplasia or as the non-specific end result of degenerative change, while it is considered by others as a definite clinicopathologic entity. Here, we report on a case of LSMFT occurring in tibia, which is a very uncommon location for this tumor, and we review the related literatures. The case presented here shares features with those described for LSMFT, except for the location of this tumor. We believe that more studies on a larger scale that compare LSMFT with other benign bone lesions, including fibrous dysplasia, are required to clarify the origin and behavior of this lesion.
- The Clinicopathologic Analysis of Kikuchi's Lymphadenitis.
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Jung Woo Choi, Ji Hye Lee, Ju Han Lee, Yang Seok Chae, Insun Kim
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Korean J Pathol. 2004;38(5):289-294.
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- BACKGROUND
Kikuchi's disease has been known as a self-limiting lymphadenitis mostly affecting the cervical lymph nodes of young women.
METHODS
We retrospectively reviewed the clinical data of 77 cases of Kikuchi's lymphadenitis from 1996 to 2003 at Korea University Medical Center.
RESULTS
Histologically, 69 available cases were classified into three types: proliferative (60.8%), necrotizing (33.3%), and xanthomatous type (5.7%). These three types differed in terms of their clinical features, showing tenderness most predominantly in the necrotizing type. In spite of the insufficient numbers of cases, the data on the duration of the disease well correlated with the possible progression of the three histologic types (Kikuch's disease begins as proliferative type, then progress into necrotizing type and finally resolves into xanthomatous type). During the ten-month period of the mean follow-up, the recurrence rate was 7.0%. Three and two patients developed into pulmonary tuberculosis and systemic lupus erythematosus, respectively, but there were no prognostic differences among the three types.
CONCLUSIONS
Our results confirmed that Kikuchi's lymphadenitis is a self-limiting necrotizing lymphadenitis with a low rate of recurrence. Here, we suggest that the classification of histologic types have some meanings because of their differences in certain clinical aspects and possible sequential disease progression.
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