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Cytologic Analysis of Metastatic Malignant Tumor in Pleural and Ascitic Fluid.
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HOME > J Pathol Transl Med > Volume 6(2); 1995 > Article
Original Article Cytologic Analysis of Metastatic Malignant Tumor in Pleural and Ascitic Fluid.
Mee Joo, Hye Je Cho
Journal of Pathology and Translational Medicine 1995;6(2):125-132
DOI: https://doi.org/
Department of Anatomic Pathology, Sanggye Paik Hospital, Inje University, Korea.
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Cytodiagnosis of pleural and ascitic fluid is a commonly performed laboratory examination. Especially, positivity for malignant cells in effusion cytology is very effective and also presents the first sign of malignancy in unknown primary site of the tumor. We examined each 34 cases of pleural and ascitic fluid cytologic specimen diagnosed as metastatic tumor, which was selected among 964 pleural fluid cytology cases and 662 ascitic fluid cytology cases from September 1989 to June 1995. Among the ascitic fluid cytology specimens examined, 34 specimens were positive in 29 patients. The most common primary neoplasms were carcinomas of ovary (32%), stomach (32%), colon (6%), breast (3%), pancreas (3%), and lung (3%) and lymphoreticular neoplasms (3%). The metastatic tumor was predominantly adenocarcinoma type in both pleural (82%) and ascitic (91%) fluid. The study of metastatic adenocarcinoma in effusion from lung, ovary, and stomach was undertaken to find distinctive features for the identification of the primary site. The smears of metastatic pulmonary adenocarcinoma had a tendency to show high grade pleomorphism and many large tight cell clusters, whereas that of the ovarian adenocarcinoma showed low grade pleomorphism with abundant intracytoplasmic vacuoles in relatively clear background. That of the stomach revealed the intermediate features.

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