Abstract:Objective To investigate the effect of ultrasound diagnosis in the patients with simple mucinous adenocarcinoma of the breast. Methods Sonographic characteristics of 80 cases of breast pure mucinous carcinoma were retrospectively analyzed. The patients received surgical treatment in our hospital from March 2012 to June 2015. According to the size of the lesion measured by ultrasound, the patients were divided into the group of tumor lesion diameter <35 mm (37 cases, smaller lesion group) and the group of lesion diameter ≥35 mm (43 cases, larger lesion group). The accuracy of ultrasound diagnosis and ultrasound features were analyzed in the patients of the two groups. Results The mean age of the patients in the smaller lesion group was (51.2 ± 13.4) years, which was significantly younger than that of the larger lesion group [(59.5 ± 11.3) years]. The diagnostic accuracy of the smaller lesion group was 75.68%, which was significantly lower than that of the larger lesion group (93.02 %, P <0.05). Compared with the smaller lesion group, the larger lesion group had mostly lobulated lesion morphology, the difference was statistically significant (P < 0.05). The rate of grade Ⅲ blood flow and systolic peak velocity value (SPVmax) in the larger lesion group were significantly higher than those in the smaller lesion group, the differences were statistically significant (P < 0.05). The resistance index (RI) had no statistical difference between the two groups (P > 0.05). Conclusions The smaller the lesions, the higher the misdiagnosis rate of the lesions. The larger lesions are often lobulated and rich in blood flow. Under ultrasound, breast mucinous adenocarcinomas with different diameter have their own morphological characteristics, which can be fully used in clinic.