[Imaging of the breast treated with quadrantectomy and radiotherapy. Interpretative difficulties in diagnosing asymptomatic recurrences].

This study was aimed at evaluating the incidence of breast carcinoma recurrences in a group of female patients treated with QU.A.RT. July 1989 to December 1990, 111 asymptomatic patients underwent physical examination, mammography (in both cranio-caudal and 45 degrees oblique projections), and US with 7.5 and 10 MHz probes. The study population was made of patients operated between 1984 and 1989 and subsequently treated with radiotherapy. Twenty-seven cases with suspect mammographic and US findings were selected and submitted to cytology with needle biopsy under US or stereotaxic guidance. Ten of them exhibited recurrences (9%) at cytology. Of the extant 17 cases, 5 had inflammatory lesions, 1 had liponecrosis, and 11 patients presented with no pathologic cells. The interpretative difficulties of mammographic and US findings were also examined. Problems were found to be related to both correct execution of the technique due to the treatment the breast is submitted to (volumetric reduction and structural distortion) and to correct image interpretation. Therefore we conclude that the two diagnostic methods be combined for they are complementary in the early detection of breast carcinoma recurrence.