• Toxicological Research
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• 제9권1호
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• pp.1-11
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• 1993

This study was carried out to investigate the immunopathological effects of 7, 12-Dimethylbenz[a]anthracene(DMBA) on mouse thymus. DMBA was administered subcutaneously to BALB/C mice by interscapular single injection of 50 or 100 ng/g of body weight. Each DMBA treatment group and additional corn oil control group of mice were studied on day 1, 3, 7, 14 and 21 following the injection of DMBA. DMBA treatment resulted in marked decreases in weights and cellularity of thymus. Thymus weights were decreased by 50.6 and 66.0% at 21 days, respectively, after treatment of 50ng/g and 100 ng/g DMBA.

• 대한세포병리학회지
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• 제12권2호
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• pp.97-103
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• 2001

Carcinoma ex pleomorphic adenoma(CXPA) is a rare malignant tumor of the salivary gland, fine needle aspiration cytology(FNAC) of which are rarely reported. We retrospectively reviewed FNAC of five cases of histologically proven CXPA of the salivary glands diagnosed in Seoul National University Hospital to evaluate their cytologic characteristics. Histologically, the carcinoma components were low-grade in three cases and high-grade in two cases. The cytologic diagnosis were malignancy in two cases(40%), suspicious for malignancy in one(20%), and benign(pleomorphic adenoma) in two(40%). All of the high-grade carcinomas were correctly diagnosed by FNAC, however, 2 cases of low-grade carcinomas were diagnosed as benign by FNAC. The low sensitivity in cytologic diagnosis is due to interpretative difficulties in low-grade tumors. The characteristic cytologic features of CXPA were high cellularity, necrotic, bloody, and inflammatory background, marked nuclear overlapping, coarsely granular chromatin, prominent macronucleoli, and atypical mitosis in epithelial component in addition to the typical biphasic pattern of pleomorphic adenoma consisting of epithelial cells admired with spindle-shaped cells and chondromyxoid stroma. Even though low-grade tumors show mild pleomorphism, the cytologic findings of necrotic background, moderate to high cellularity, and nuclear overlapping could lead to an accurate cytodiagnosis of CXPA.

• 대한세포병리학회지
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• 제15권1호
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• pp.33-39
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• 2004

We compared the diagnostic accuracy of liquid-based cervicovaginal cytology using $MonoPrep2^{TM}$ system (Monogen, Herndon, Virginia, USA), a manual system based on membrane filtration method, with conventional Pap smear. Study population included 92 patients visiting the gynecologic department under the suspicion of uterine cervical disease. In thirty of them, surgical biopsy was performed. $MonoPrep2^{TM}$ system provided well-preserved monolayer specimen with good nuclear morphology. However, about 19% of specimens were inadequate to interpret due to low cellularity. The detection rate of abnormal cells more than ASCUS (atypical squamous cells of unknown significance) was 23.9% and higher than 19.4 % of conventional Pap smear. Diagnostic concordance rate with conventional Pap smear was 81%, and severe discordance rate influencing on the management of patient was 7.6 %. Among these seven cases, $MonoPrep2^{TM}$ system was more diagnostic only in four. In comparison with histology, the sensitivity of diagnosis of $MonoPrep2^{TM}$ system was 78.9% and slightly higher than 73.5% of conventional Pap smear. However, the specificity was 81.1% and lower than 90.9% of Pap smear. In conclusion, $MonoPrep2^{TM}$ system provided diagnostic accuracies similar to the conventional Pap smear. The inexpertness of slide preparation and the low cellularity were considered to endow a limitation in more accurate evaluation.

• Toxicological Research
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• 제8권2호
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• pp.179-189
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• 1992

This study was carried out to investigate the immunopathological effects of 7,12-Dimethylbenz[a]anthracene(DMBA) on spleen in mice. DMBA was administered subcutaneously to BALB/C mice by interscapular single injection of 50 or 100${\mu}g/g$ of body weight. Each DMBA treatment group and additional corn oil control group of mice were studied on day 1,3,7,14 and 21 following the injection of DMBA. DMBA treatment resulted in marked decrease in weights and cellularity of spleen. Spleen weights showed the greatest decrease at 14days after 50${\mu}g/g$ DMBA treatment, and at 21days after 100${\mu}g/g$ DMBA treatment. Spleen cellularity was similarly deceased in comparison with spleen weights. Spleen showed morphologically no typical changes throughout the experiment after 50${\mu}g/g$ DMBA treatment. Following the treatment of 100${\mu}g/g$ DMBA the spleen showed severe fibrosis, hemosiderin precipitation, and megakaryocytes decrease in red pulp at 14 days, while hemopoietic function was partly restored in addition to the appearance of a few megakaryocytes at 21 days. In spleen sections treated with antibodies to IgM or Thy1.2, lymphocytes strongly stained with IgM antibody were infiltrated around the central artery within the white pulp, and T-lymphocytes of periarterial lymphatic sheath (PALS) were diminished and destructed in sections treated with Thy1.2 antibody, at 14 days after the treatment of 100${\mu}g/g$ DMBA. By the electron microscopy phagocytic epithelial cells or macrophages were remarkably increased in spleen at 14and 21days following the treatment of 100${\mu}g/g$ DMBA.

• Fisheries and Aquatic Sciences
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• 제9권1호
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• pp.14-21
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• 2006

The aim of this study was to investigate in vivo toxicity and effects of two phthalate esters (PEs), di-n-butylphthalate (DBP) and di-2-ethylhexyl phthalate (DEHP), on the immune system of the bagrid catfish, Pseudobagrus fulvidraco. Groups of experimental fish were subjected to daily intraperitoneal injections of 300 or 1000 mg $kg^{-1}$ of DBP or DEHP for 3 days, and the cellularity and functional activity of phagocytes were measured in the spleen and pronephros (head kidney). The number of spleen leukocyte cells increased significantly (p<0.05) in response to low and high doses of DEHP and DBP, respectively; however, the cellularity of the pronephros was more susceptible to higher dose of DEHP than DBP. Nonspecific immunity, as determined by the phagocytic index (PI) and phagocytic capacity (PC), was significantly depressed by DEHP at 1000 $1000mg\;kg^{-1}\;day^{-1}$ in the pronephros at 3 days after injection. Furthermore, significantly (p<0.05) increased levels of serum glutamic oxaloacetate transaminase (GOT) and glutamic pyruvate transaminase (GPT) indicated marked hepatic dysfunction in immunosuppressed fish. Treated fish showed a significant reduction in total serum protein but no significant alteration in lysozyme activity. These results demonstrate the sensitivity of the fish immune response for predicting PE-induced immunotoxicity.

• 대한세포병리학회지
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• 제19권1호
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• pp.41-46
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• 2008

In an attempt to better define the cytologic characteristics of schwannomas, we have reviewed aspirates and corresponding histologic sections from 23 schwannomas. Of this number, the original cytologic diagnoses were: schwannoma in 14 cases (61%), benign soft tissue tumor in 2 cases (9%), and insufficient specimen in 7 cases (30%). The cytologic findings common to all cases of schwannoma included fragments of tightly cohesive fascicles with variable cellularity and corresponding Antoni type A area. The Antoni type B area, consisting of scattered spindle cells and some histiocytes and lymphocytes against a myxoid background, was seen in 14 cases. Fibrillary stroma was seen in 12 cases. The tumor cells had spindle- or ovalshaped nuclei, with pointed ends and indistinct cell borders. Nuclear palisading was seen in 10 cases, and distinctive Verocay bodies were seen in 5 cases. In ancient schwannomas, there were no Verocay bodies. Most schwannomas have distinct cytomorphologic features that allow correct diagnosis. The major problem with fine needle aspiration cytology of these tumors is the high frequency of poor cellularity, particularly in lesions with cystic degeneration. Of 7 cases with insufficient specimen, 4 showed marked cystic changes and 1 showed marked hyaline changes on histologic sections. In conclusion, we believe that if cytopathologist reminds the situation such as cystic degeneration or hyaline degeneration, the correct diagnosis of the schwannoma will be easily made.

• Tuberculosis and Respiratory Diseases
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• 제53권2호
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• pp.136-147
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• 2002

연구배경 : 간질성 폐질환은 병리소견, 임상경과 및 치료에 대한 반응에 있어서 다양한 양상을 보이지만 궁극적으로는 폐섬유화로 진행한다. 최근 간질성 폐질환의 병태생리에 있어서 폐상피세포의 아포프토시스가 폐섬유화로의 진행에 관여한다는 것이 보고되고 있다. 이에 저자들은 간질성 폐질환 환자에서 아포프토시스가 갖는 임상 및 병리학적 의미를 확인하기 위하여 TUNEL을 이용한 아포프토시스의 지수와 임상양상, 병리소견, HRCT소견, 그리고 치료반응 등과의 상관관계를 분석하였다. 방 법 : 개흉폐생검을 통해서 확진된 간질성 폐질환 환자 20명을 대상으로 하였다. 아포프토시스의 지수는 TUNEL 양성세포의 분율에 따라서 0-2로 구분하였다. 임상양상은 CRP 점수체계를 응용하여 이용하였다. 병리소견은 섬유화, 세포충실도, 탈락화, 육아조직성 정도에 따라 점수화하였다. HRCT소견은 간유리음영과 봉와양음영을 각 엽별로 침범한 정도에 따라서 점수화하였다. 치료의 반응은 치료전과 치료후 3개월째에 시행한 CRP 점수체계의 변화율이 10%이상 증가하였을 때 치료효과가 있는 것으로 판정하였다. 결 과 : 대상 환자는 20명(남 14명, 여 6명)으로 조직학적 아형으로는 AIP 3명, NIP 2 명, BOOP 8명, UIP 7 명이었다. 아포프토시스 지수와 CRP 점수체계의 요소들과는 유의한 상관관계가 없었으며 또한 HRCT소견인 간유리음영점수와 섬유화점수는 역시 유의한 상관관계가 없었다. 조직학적소견에서는 섬유화 점수, 세포충실도 점수, 그리고 탈락화 점수에서 아포프토시스 지수와 유의한 상관관계를 보였다. 부신피질호르몬 치료를 받은 16명의 환자중에서 9명 (56.3%)에서 치료효과가 있었는데 부신 피질호르몬 치료효과 유무와 아포프토시스 지수사이에는 상관관계는 없었다. 급, 아급성 간질성폐렴에서는 세포충실도 점수와 탈락화 점수가 아포프토시스 지수와 유의한 상관관계를 보였으며 만성 간질성 폐렴에서는 섬유화 점수와 세포충실도 유의한 상관관계를 보였다. 결 론 : 간질성 폐질환에서 아포프토시스 지수와 병리학적 지표들과의 유의한 상관관계를 관찰한 본 연구를 통하여 간질성 폐질환의 병태생리에 아포프토시스가 관여한다는 사실을 확인할 수 있었다.

• 대한세포병리학회지
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• 제3권2호
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• pp.94-99
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• 1992

Meningioma is the most common neoplasm of central nervous system which is hardly diagnosed by cytologic examination. However, preoperative cytologic diagnosis can be easily made in the case of extracranial meningioma, especially in head and neck lesion. We recently experienced a case of fine needle aspiration cytology of meningioma in sub-mandibular area of a 24 year-old male patient. The smear revealed high cellularity in the clean background. individual tumor cell of nests or syncytium had round or oval nuclei with fine chromatin and moderate amount of lightly stained cytoplasm with indistinct margin. Characteristic cellular whorls, intranuclear inclusions and scattered psammoma bodies made it easy to diagnose a meningioma.

• 대한세포병리학회지
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• 제9권1호
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• pp.95-98
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• 1998

Papillary renal cell carcinoma (RCC) is an uncommon subtype of RCC that has distinctive gross, histologic, and cytogenetic features. The cytologic features of FNA are abundant papillary clusters and relatively few single cells. The cells are usually small and contain uniform nuclei; numerous macrophages with foamy cytoplasm are often found in the background. We describe a case of papillary renal cell carcinoma evaluated by fine needle aspiration cytology(FNAC) in a 42 year-old man. The smear showed a few papillary clusters and numerous macrophages with foamy cytoplasm in the background. With adequate cellularity, papillary RCC can be distinguished reliably from non-papillary RCC by FNAC.

• 한국가금학회지
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• 제19권2호
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• pp.57-64
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• 1992

한국법과 육계의 지방세포에 대한 세포학적 비교를 하였던 바 정의 지방세포의 직경은 평균 25~45$\mu$으로서 비교적 같은 체중의 육계의 40~55$\mu$에 비하여 월등히 적었으며 세표용적은 육계의 48~101pl에 비하여 불과 10~75pl로 지방 저장능력이 아주 낮은 것으로 확인되었으며 따라서 극히 소량의 복부 지방층은 지방세포의 작은 직경에 기인하는 것으로 사료된다.