A sentinel node biopsy done at the time of @entity5 resection allows for a one-stage surgical procedure. In addition, sentinel node identification may be impaired when done after a previous @entity5 excision. This study evaluates the sentinel node biopsy in @entity1 with nonpalpable @entity0 and assesses whether a sentinel node biopsy for mammographically suspect @entity1558 is justified when preoperative needle biopsy is inconclusive for invasive @entity5 . A sentinel node biopsy was done in 67 @entity1 with nonpalpable @entity1558 after injection of radioactive tracer (intraparenchymal in 35 and subdermal in 32) and blue dye (para-areolar). A preoperative core needle biopsy was positive for @entity5 in 42 @entity1 . Thirteen @entity1 had positive cytology or @entity3821 ( @entity3821 ). In 12 @entity1 the needle biopsy was nondiagnostic, but the lesions remained highly suggestive of @entity5 on mammography. Sentinel node biopsy was successful in 64 @entity1 (96%). In these, the sentinel node was both radioactive and blue in 58 @entity1 (91%). Only 4 of 13 @entity1 with positive cytology or @entity3821 on preoperative needle biopsy and only 5 of 12 @entity1 without a preoperative diagnosis had an invasive @entity5 after resection. Sentinel nodes were positive for nodal metastases in 9 of 49 @entity1 (18%) with a successful sentinel node biopsy for invasive @entity5 . None of the eight @entity1 with @entity3821 had nodal metastases. The sentinel node procedure avoids the potential morbidity of an axillary dissection in more than 80% of @entity1 with nonpalpable @entity0 . A sentinel node biopsy for mammographically detected suspect @entity1558 is not justified without a preoperative histologic diagnosis of @entity0 .

Sentinel node biopsy for nonpalpable XXXX requires a preoperative diagnosis of @entity0 .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity3821 :: ('MESH:D002285', 'Disease') :: ['ductal carcinoma in situ', 'DCIS'] @entity0 :: ('MESH:D001943', 'Disease') :: ['breast cancer', 'invasive breast cancer'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'cancer', 'initial tumor', 'malignancy'] @entity1558 :: ('MESH:D001941', 'Disease') :: ['breast lesions']
@entity0 :: (MESH:D001943,Disease) :: ['breast tumors']
