"Dial of a Clock" Search Pattern for Clinical Breast Examination

Abstract

Background: Clinical breast examination (CBE) is an integral component of triple assessment for women presenting with symptomatic breast disease. Four common search patterns of CBE are "dial of a clock" (DC), "vertical strips" (VS), "quadrant-wise" (QW), and "concentric circles" (CC). The most sensitive search pattern of CBE has not been established.

Methods: A cross-sectional study was conducted on women with symptomatic breast disease, to measure various diagnostic performance indices of four different search patterns of CBE by a professor, a surgical resident trainee, and a trained nurse. Women were examined one at a time randomly by three examiners. Each examiner examined with four different search patterns of CBE, one method at a time. Any nodularity or lump detected was noted and the findings were compared with breast sonography, which was considered as the gold standard. Statistical analysis was done using STATA 14, SPSS 20, and OpenEpi software for diagnostic test indices.

Results: Sixty women (mean age = 39.6) with palpable findings of both breasts were included (n = 120). Most women presented with complaints of breast lump (70%) and mastalgia (27%). Sensitivity was highest for DC as elaborated [% (95% confidence interval)]: DC[73.2 (60-83)] > CC[66 (53-77)] > VS[62.5 (49-73)] > QW[58.9 (45-70)] for professor; DC[64.2 (51-75)] > VS[62.5 (49-73)] > CC[57.1 (44-69)] > QW[57.1 (44-69)] for resident; and DC[82.1 (70- 90)] > VS[78.5 (66-87)] > CC(75 (62-84)] > QW[73.2 (60-83)] for nurse. The minimum sonographic tumor size picked up by DC by all the examiners was 7 mm.

Conclusions: The DC search pattern of CBE demonstrated the highest sensitivity for all the examiners. The trained nurse achieved the highest sensitivity among all the examiners.

Keywords: Breast cancer; Clinical breast examination (CBE); Search patterns of CBE.