title: Cytological characteristics of pulmonary pleomorphic and giant cell carcinomas.
abstract: OBJECTIVE
  To establish cytological features of pulmonary pleomorphic carcinoma (PC) or giant cell carcinoma (GC), we evaluated the cytological characteristics of these tumors using a multidisciplinary approach.
  
  
  METHODS
  Samples from 13 surgically resected and histologically confirmed PC or GC patients were collected from our institutes. Eight cases without prior chemotherapy before surgery were selected, and cytological features were analyzed.
  
  
  RESULTS
  The background contained numerous lymphocytes and neutrophils. The tumor cells were arranged in flat loose clusters, but some were in fascicles. The shape of the tumor cell was spindle or pleomorphic, and the sizes of the tumor cells varied by more than 5-fold. The tumor cells had an abundant, thick and well-demarcated cytoplasm. The location of the nucleus was centrifugal, and the nucleus was oval or irregularly shaped. Multinucleated giant cells were frequently observed. The size of the nucleus was more than 5 times that of normal lymphocytes, and its size also varied by more than 5-fold. The nuclear membrane was thin, and nuclear chromatin was coarsely granular, while the nucleolus was single and round.
  
  
  CONCLUSIONS
  PC or GC has characteristic cytological features, however, spindle cells tended to be hardly observed in cytological specimens in some cases.
authors.affiliation: Committee on Pulmonary Cytology, The Japan Lung Cancer Society, Chiba, Japan. kenzo@tymc.twmu.ac.jp
authors.forename: Kenzo
authors.initials: K
authors.lastname: Hiroshima
authors.forename: Hirotoshi
authors.initials: H
authors.lastname: Dosaka-Akita
authors.forename: Katsuo
authors.initials: K
authors.lastname: Usuda
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Ogura
authors.forename: Yoko
authors.initials: Y
authors.lastname: Kusunoki
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Kodama
authors.forename: Yasuki
authors.initials: Y
authors.lastname: Saito
authors.forename: Masami
authors.initials: M
authors.lastname: Sato
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Tagawa
authors.forename: Masayuki
authors.initials: M
authors.lastname: Baba
authors.forename: Takashi
authors.initials: T
authors.lastname: Hirano
authors.forename: Takeshi
authors.initials: T
authors.lastname: Horai
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Matsuno
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001980:Bronchi / Q000473:pathology; D018286:Carcinoma, Giant Cell / Q000473:pathology*; D002449:Cell Aggregation; D003584:Cytological Techniques / Q000379:methods*; D004847:Epithelial Cells / Q000473:pathology; D005260:Female; D015726:Giant Cells / Q000473:pathology; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged