Role of ultrasonography to detect axillary node involvement in operable breast cancer

European Journal of Surgical Oncology : the Journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology
J S VaidyaI Mittra

Abstract

Prompted by the concern about unnecessary axillary dissections, we prospectively studied the accuracy of clinical examination (CE) and conventional ultrasonography (USG, 7.5 MHz), to diagnose pre-operatively metastatic axillary lymph nodes in 200 operable breast cancer patients. USG had higher specificity (90% vs 77%, P = 0.025) and higher positive predictive value (ppv = 90% vs 76%, P = 0.02) than CE. Together, CE + USG had higher sensitivity (82% vs 58%, P = 0.00005) and higher negative predictive value (npv = 76% vs 58%, P = 0.008) than CE alone. In women < 45 years, CE + USG had higher sensitivity (91% vs 76%, P = 0.037) and npv (89% vs 67%, P = 0.018) than in older women. The sensitivity and npv of CE + USG to detect > 1 positive node were 97% (for both) in women < 45 years compared to 81% and 79% in older women. The high sensitivity of CE + USG (82% for the whole group) is probably due to the higher proportion of young women (median age = 45) in our population. It suggests that using CE + USG to avoid axillary dissection in some patients is feasible.

Citations

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