Journal of Pathology and Translational Medicine

Original Article

Comparison of Unsatisfactory Samples from Conventional Smear versus Liquid-Based Cytology in Uterine Cervical Cancer Screening Test: Hoiseon Jeong, Sung Ran Hong, Seoung-Wan Chae, So-Young Jin, Hye Kyoung Yoon, Juhie Lee, Eun Kyung Kim, Sook Tai Ha, Sung Nam Kim, Eun-Jung Park, Jong Jae Jung, Sun Hee Sung, Sung-chul Lim; J Pathol Transl Med. 2017;51(3):314-319. Published online April 17, 2017; DOI: https://doi.org/10.4132/jptm.2017.03.17

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Background
Cervical cytology for uterine cervical cancer screening has transitioned from conventional smear (CS) to liquid-based cytology (LBC), which has many advantages. The aim of this study was to compare the proportion of unsatisfactory specimens from CS versus LBC at multiple institutions including general hospitals and commercial laboratories.
Methods
Each participating institution provided a minimum of 500 Papanicolaou (Pap) test results for analysis. Pap tests were classified according to the participating institution (commercial laboratory or general hospital) and the processing method (CS, ThinPrep, SurePath, or CellPrep). The causes of unsatisfactory results were classified as technical problems, scant cellularity, or complete obscuring factors.
Results
A total of 38,956 Pap test results from eight general hospitals and three commercial laboratories were analyzed. The mean unsatisfactory rate of LBC was significantly lower than that of CS (1.26% and 3.31%, p = .018). In the LBC method, samples from general hospitals had lower unsatisfactory rates than those from commercial laboratories (0.65% vs 2.89%, p = .006). The reasons for unsatisfactory results were heterogeneous in CS. On the other hand, 66.2% of unsatisfactory results in LBC were due to the scant cellularity.
Conclusions
Unsatisfactory rate of cervical cancer screening test results varies according to the institution and the processing method. LBC has a significantly lower unsatisfactory rate than CS.

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Review

Quality Control Program and Its Results of Korean Society for Cytopathologists.: Hye Kyung Lee, Sung Nam Kim, Shin Kwang Khang, Chang Suk Kang, Hye Kyoung Yoon; Korean J Cytopathol. 2008;19(2):65-71.; DOI: https://doi.org/10.3338/kjc.2008.19.2.65

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Abstract PDF

In Korea, the quality control(QC) program forcytopathology was introduced in 1995. The program consists of a checklist for the cytolopathology departments, analysis data on all the participating institutions' QC data, including the annual data on cytologic examinations, the distribution of the gynecological cytologic diagnoses, as based on The Bethesda System 2001, and the data on cytologic-histolgical correlation of the gynecological field, and an evaluation for diagnostic accuracy. The diagnostic accuracy program has been performed 3 times per year with using gynecological, body fluid and fine needle aspiration cytologic slides. We report here on the institutional QC data and the evaluation for diagnostic accuracy since 2004, and also on the new strategy for quality control and assurance in the cytologic field. The diagnostic accuracy results of both the participating institutions and the QC committee were as follows; Category 0 and A: about 94%, Category B: 4~5%, Category C: less than 2%. As a whole, the cytologic daignostic accuracy is relatively satisfactory. In 2008, on site evaluation for pathology and cytology laboratories, as based on the "Quality Assurance Program for Pathology Services" is now going on, and a new method using virtual slides or image files for determining the diagnostic accuracy will be performed in November 2008.

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Case Reports

Cellular Angiofibroma of the Vulva: A Report of Three Cases.: Hye Jeong Choi, Sung Nam Kim, Kyu Rae Kim; Korean J Pathol. 2001;35(3):259-262.

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Abstract PDF: Cellular angiofibroma is a recently described, distinctive soft tissue tumor of the vulvovaginal region which is characterized by small, well-circumscribed tumors with fibroblastic differentiation. We report three cases of cellular angiofibroma of the vulva in middle-aged women. All three patients presented with painless swelling in the labium majora. The age of the three patients ranged from 43 to 56 years old (mean: 48 years old) and the size of the tumor ranged from 2 to 5 cm. The microscopic appearance was characterized by a cellular, well-circumscribed mass composed of uniform, bland, spindle stromal cells, numerous thick-walled, hyalinized vessels, and a scarce component of mature adipocytes. Immunohistochemical stains of the tumor cells show positivity for vimentin but negativity for smooth muscle actin, S-100 protein, desmin, factor VIII-related antigen and epithelial membrane antigen. The tumor should be differentiated from aggressive angiomyxoma and angiomyofibroblastoma because of its different clinicopathologic features, cells of origin and immunohistochemical findings.

Dendritic Myxofibrolipoma.: Sung Nam Kim, Kye Hyun Kwon, Yeon Lim Suh; Korean J Pathol. 2001;35(5):447-450.

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Abstract PDF: Dendritic myxofibrolipoma is a recently described disease entity that represents a distinctive benign soft tissue neoplasm showing the combined features of spindle cell lipoma and the solitary fibrous tumor. Immunohistochemical stains reveal a strong positivity for vimentin, CD34 and bcl-2, which highlight the dendritic nature of the tumor cells by demonstrating slender complex cytoplasmic prolongations. There have been 12 cases of dendritic myxofibrolipomas reported in literature. In Korea, none of the cases have been described. We report such a case with a 28-year-old man who had a palpable subcutaneous mass on his right shoulder for 4 months. Grossly, the removed mass measured 11X7X5 cm and appeared to be a well-encapsulated, lipomatous tumor with marked myxoid appearance. Microscopically, this tumor consisted of spindle cells admixed with dense collagen fibers and mature adipocytes in abundant myxoid stroma with high vascularity. Immunohistochemically, the tumor cells were strongly reactive for vimentin and CD34 and weakly reactive for bcl-2, and negative for S-100 protein.

Uterine Leiomyomas with Perinodular Hydropic Degeneration: A Report of Two Cases.: Sung Nam Kim, Jaejung Jang, Kyu Rae Kim; Korean J Pathol. 2002;36(4):257-261.

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Abstract PDF: Hydropic degeneration is a frequent degenerative change in otherwise typical uterine leiomyomas. Very rarely, however, a significant amount of edema fluid accumulates around the fascicles of neoplastic smooth muscle bundles and forms the characteristic multinodular growth pattern that is called perinodular hydropic degeneration of leiomyoma (PHDL). The gross findings, showing a vague worm-like appearance and very rarely having an extrauterine extension, and the microscopic features, showing perinodular retraction artifacts forming pseudovascular spaces, make it difficult to differentiate the tumor from intravenous leiomyomatosis or myxoid leiomyosarcoma. We described two cases of leiomyomas showing perinodular hydropic degeneration (PHD), a condition that has rarely been described in English literature, and discussed the mechanism of forming "extrauterine extension" or cotyledonoid features. One of our cases showed the typical features of cotyledonoid dissecting leiomyoma, the other showed those of intramural dissecting leiomyoma. An awareness of the gross and microscopic findings of PHDL is important not to overdiagnose a benign smooth muscle neoplasm as a more aggressive type of tumor. It is thought that intramural dissecting leiomyoma, cotyledonoid dissecting leiomyoma, and PHDL are not distinct, but closely related subtypes showing different phases of evolutionary changes.

Original Articles

Comparison of Efficacy of Human Papilloma Virus Genotyping Assays using Restriction Fragment Mass Polymorphism and DNA Chip Analysis in Patients with Abnormal Pap Smear and Uterine Cervical Cancer.: Hyun Jae Chung, Sung Nam Kim, Eun Hee Lee, Mi Sun Jee, Min A Kim, Sun Young Hwang, Hee Jung Cho, Soo Ok Kim, Sun Pyo Hong; Korean J Pathol. 2006;40(6):439-447.

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Abstract PDF: BACKGROUND
High-risk human papilloma virus (HPV) infection is the primary cause of cervical cancer; there is a need for more sensitive and reliable methods for HPV genotyping to use as screening tools for early detection and intervention. METHODS: A novel MALDI-TOF MSbased assay, termed Restriction Fragment Mass Polymorphism (RFMP) was developed for multiple HPV genotyping. Its performance was compared with DNA chip technology. The study was based on 164 cases classified as normal (n=40), ASCUS (n=53) and invasive squamous cell carcinoma (SCC, n=71) by a PAP smear and/or cervical colposcopic biopsy.
RESULTS
High-risk genotypes were detected in 7.5%, 47.2% and 97.2% in normal, ASCUS and SCC groups by RFMP, and in 20.0%, 41.5% and 90.1% using DNA chip technology, respectively. The results showed substantial concordance, with a kappa coefficient of 0.688, between the methods. Diagnostic sensitivity and specificity for cervical cancer were found to be 97.2% and 92.2% with RFMP and 90.1% and 80.0% using DNA chip microarrays.
CONCLUSIONS
RFMP and DNA chip technologies were shown to be reliable methods for HPV genotyping with a high concordance. The improved sensitivity and specificity should make RFMP a viable option for the management of women with cervical neoplastic lesions.

Pathological Analysis of 15 Cases of Phyllodes Tumors of the Breast.: Sung Nam Kim, Woo Ho Kim, Sang Kook Lee; Korean J Pathol. 1993;27(1):19-26.

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Abstract PDF: Retrospective clinicopathologic analysis of 15 patients with the phyllodes tumors(PT) of the breast, diagnosed at SNUH over 6 years period, was done. By light microscopy, 8 cases were diagnosed as benign, and 7 cases were diagnosed as malignant. Mean ages o the patients were 37 and 34 years in malignant and benign, respectively. Most of those cases were presented with a palpable mass of the breast. None of the patients with malignant PT had distant metastasis, Local recurrences were experienced in 3 patients among the malignant PT, and one patient among the benign PT. One of 7 malignant PT was coexisted with simultaneous ipsilateral infiltrating duct carcinoma. The clinical course was not well correlated with pathologic features. The prognostic significances of several histopathologic parameters were assessed for possible correlation with local recurrence, metastasis and death; stromal cellularity, stromal cellular atypism, mitotic activity, tumor contour, necrosis, tumor size and heterologous stromal elements. Immunohistochemistry using antibody to vimentin, proliferating cell nuclear antigen(PCNA) and epidermal growth factor receptor(EGF-R) were analysed. In the 5 cases of benign PT, the stromal cells stained diffusely positive for vimentin and 3 cases of malignant tumors show similar staining for vimentin. The percentage of PCNA-positive cells were higher in the malignant PT than in the benign ones; they were 3.5% to 60% in malignancy, while they were less than 60% in all benign PT. The results of EGF-R staining were correlated with the histologic classification; only 2 cases out of 8 benign PT show diffusely positive staining of EGF-R in the cytoplasm, but 6 cases out of 7 malignant PT show positive findings.

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