Apoptosis in breast cancer as related to histopathological characteristics and prognosis.
Apoptotic cells were quantitated by light microscopy in a series of 288 breast carcinomas, and their number (cells/mm2 of neoplastic epithelium, i.e., the apoptotic index, AI) was related to various histopathological features and disease outcome. High AI was associated with tumour necrosis (P = 0.003), lack of tubule formation (P = 0.03), dense stromal lymphocyte infiltration (P = 0.0009), high grade of the tumour (P < 0.0001), DNA aneuploidy (P = 0.049), high S-phase fraction (P = 0.010), high mitotic rate (P < 0.0001), lack of sex steroid receptors (P = 0.004), expression of p53 tumour suppressor gene (P = 0.004), and high values of morphometrically measured nuclear factors (P < 0.05). In survival analysis, an AI greater than 3/mm2 was related to short recurrence-free survival in the entire cohort (P = 0.0079) as well as in the axillary lymph node-negative tumours (P = 0.0253). Survival of the patients with node-negative tumours (P = 0.0356), node-positive tumours (P = 0.0085) and in the entire cohort (P = 0.004) was related to AI. Recurrence-free survival was related to the mitotic index (P = 0.0012), ductal type (P = 0.011), S.D. of the nuclear area (P = 0.075), and axillary lymph node status (P = 0.096). Cox's analysis showed that only the tumour diameter (P < 0.001), axillary lymph node status (P = 0.001), progesterone receptor content (P = 0.004) and ductal type (P = 0.041) had independent prognostic value, whereas AI did not.
Department of Pathology, University of Kuopio, Finland.
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Aaltomaa
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Syrjänen
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017209:Apoptosis; D001943:Breast Neoplasms / Q000737:chemistry / Q000401:mortality / Q000473:pathology*; D018270:Carcinoma, Ductal, Breast / Q000473:pathology; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008207:Lymphatic Metastasis; D008875:Middle Aged; D008940:Mitotic Index; D011379:Prognosis; D011980:Receptors, Progesterone / Q000032:analysis; D015996:Survival Rate
D011980:Receptors, Progesterone