Re-audit of Accuracy of Axillary Ultrasound Scan in detecting Metastatic Lymph Node Involvement in Breast Cancer Patients
Association of Breast Surgery ePoster Library. Sein T. 05/13/19; 257066; P022
Mr. Tin Sein
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P022
Topic: Axilla
PurposeTo compare the detection rate of USS for malignant lymph nodes using modified criteria of 2.5mm cortical thickness of lymph node with our previous audits which used the cortical thickness 3 mm as a criterion.Materials and MethodsIn a year (01/04/16 - 31/03/17), we included 134 eligible patients. Cortical thickness of 2.5 mm and cortical and hilar morphology of the lymph node were used as sonographic criteria. Trucut biopsy or FNAC were taken to confirm the metastasis. Normal sonography and negative tissue result of abnormal looking node led to SLNB. Positive tissue diagnosis led to ANC. ResultsImproved sensitivity of 69% compared to 56% and 57% in previous audits while maintaining the similar specificity of 92% compared to 93% and 91% in past years. These results are comparable to published data (sensitivity of 49%-94% and specificity of 53%-97%). Royal College of Radiologists' audit target is 50% sensitivity.ConclusionEven though we still have a considerable false negative rate particularly with low volume/burden axilla, reducing the cortical thickness to 2.5mm could improve the accuracy of ultrasound scan in detecting the abnormal lymph node in the axilla of breast cancer patients.
Topic: Axilla
PurposeTo compare the detection rate of USS for malignant lymph nodes using modified criteria of 2.5mm cortical thickness of lymph node with our previous audits which used the cortical thickness 3 mm as a criterion.Materials and MethodsIn a year (01/04/16 - 31/03/17), we included 134 eligible patients. Cortical thickness of 2.5 mm and cortical and hilar morphology of the lymph node were used as sonographic criteria. Trucut biopsy or FNAC were taken to confirm the metastasis. Normal sonography and negative tissue result of abnormal looking node led to SLNB. Positive tissue diagnosis led to ANC. ResultsImproved sensitivity of 69% compared to 56% and 57% in previous audits while maintaining the similar specificity of 92% compared to 93% and 91% in past years. These results are comparable to published data (sensitivity of 49%-94% and specificity of 53%-97%). Royal College of Radiologists' audit target is 50% sensitivity.ConclusionEven though we still have a considerable false negative rate particularly with low volume/burden axilla, reducing the cortical thickness to 2.5mm could improve the accuracy of ultrasound scan in detecting the abnormal lymph node in the axilla of breast cancer patients.
P022
Topic: Axilla
PurposeTo compare the detection rate of USS for malignant lymph nodes using modified criteria of 2.5mm cortical thickness of lymph node with our previous audits which used the cortical thickness 3 mm as a criterion.Materials and MethodsIn a year (01/04/16 - 31/03/17), we included 134 eligible patients. Cortical thickness of 2.5 mm and cortical and hilar morphology of the lymph node were used as sonographic criteria. Trucut biopsy or FNAC were taken to confirm the metastasis. Normal sonography and negative tissue result of abnormal looking node led to SLNB. Positive tissue diagnosis led to ANC. ResultsImproved sensitivity of 69% compared to 56% and 57% in previous audits while maintaining the similar specificity of 92% compared to 93% and 91% in past years. These results are comparable to published data (sensitivity of 49%-94% and specificity of 53%-97%). Royal College of Radiologists' audit target is 50% sensitivity.ConclusionEven though we still have a considerable false negative rate particularly with low volume/burden axilla, reducing the cortical thickness to 2.5mm could improve the accuracy of ultrasound scan in detecting the abnormal lymph node in the axilla of breast cancer patients.
Topic: Axilla
PurposeTo compare the detection rate of USS for malignant lymph nodes using modified criteria of 2.5mm cortical thickness of lymph node with our previous audits which used the cortical thickness 3 mm as a criterion.Materials and MethodsIn a year (01/04/16 - 31/03/17), we included 134 eligible patients. Cortical thickness of 2.5 mm and cortical and hilar morphology of the lymph node were used as sonographic criteria. Trucut biopsy or FNAC were taken to confirm the metastasis. Normal sonography and negative tissue result of abnormal looking node led to SLNB. Positive tissue diagnosis led to ANC. ResultsImproved sensitivity of 69% compared to 56% and 57% in previous audits while maintaining the similar specificity of 92% compared to 93% and 91% in past years. These results are comparable to published data (sensitivity of 49%-94% and specificity of 53%-97%). Royal College of Radiologists' audit target is 50% sensitivity.ConclusionEven though we still have a considerable false negative rate particularly with low volume/burden axilla, reducing the cortical thickness to 2.5mm could improve the accuracy of ultrasound scan in detecting the abnormal lymph node in the axilla of breast cancer patients.
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