[A comparative analysis of interval breast cancer with breast cancer detected by mass screening or in outpatient clinics].
To investigate the characteristics and the prognosis of interval breast cancer, 21 interval cases were reviewed and compared with a total of 87 patients with breast cancer detected by mass screening and 266 found in outpatient clinics on the basis of the clinicopathological features. The postoperative cumulative 7-year disease-free rates were 61.1%, 81.4% and 69.0% in the interval cases, mass screening cases and outpatient clinic cases, respectively. The percentage of cases showing frequent mitoses in cancer cells was statistically higher for interval cancer than for the other breast cancers. The average tumor size of the interval cases calculated from the speculated tumor doubling times, was 1.51 cm. It is surmised that interval breast cancer is characterized by a marked proliferation of tumor cells and has a poorer prognosis than the other breast cancers. This might be due to the marked proliferation of interval breast cancer rather than under-counting because there were no malignant findings at the time of the last screening.
Komaki
K
K
Second Department of Surgery, School of Medicine, University of Tokushima, Japan.
Morimoto
T
T
Oshimo
K
K
Mori
T
T
Sasa
M
M
Konishi
Y
Y
Monden
Y
Y
D000328:Adult; D000554:Ambulatory Care Facilities; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000517:prevention & control; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008403:Mass Screening; D008875:Middle Aged; D011379:Prognosis