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  • Title: Usefulness of chromosome examination in the diagnosis of malignant pleural effusions.
    Author: Dewald G, Dines DE, Weiland LH, Gordon H.
    Journal: N Engl J Med; 1976 Dec 30; 295(27):1494-500. PubMed ID: 995156.
    Abstract:
    To determine whether chromosome analysis could facilitate the diagnosis of malignant pleural effusions, we examined chromosomes in effusions from 104 unselected patients. An effusion was regarded as malignant if at least three of 30 metaphase cells were hyperdiploid or contained a marker chromosome. Results were compared with standard cytologic diagnoses. All 22 benign effusions were diagnosed correctly by cytologic examination, but one nosed correctly by cytologic examination, but one (acute rheumatoid lung disease) was misclassified as positive by chromosome criteria. Of the 82 malignant effusions, 53 (65 per cent) were diagnosed correctly by cytologic tests, as compared with 58 (71 per cent) by chromosome analysis (P greater than 0.2). Among patients with malignant neoplasms, 13 had leukemia or lymphoma; only four of these (31 per cent) were diagnosed by cytologic tests as compared with 11 (85 per cent) by chromosome analysis (P less than 0.01). The combination of standard cytologic and chromosome analyses correctly identified 83 per cent of the neoplasms, a result significantly better than that with either technic alone (P less than 0.01).
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