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Table 5 Categories of 18 F-FDG PET/CT combined with ultrasonography for indications of ALND/PSC

From: Utility of 18F-fluoro-deoxyglucose emission tomography/computed tomography fusion imaging (18F-FDG PET/CT) in combination with ultrasonography for axillary staging in primary breast cancer

Category 1 2 3 4
AUS - - + +
18F-FDG-uptake - + - +
No. of involved ALNs     
0 117 (85) 6 (50) 1 (20) 0 (0)
1 12 (9) 5 (42) 2 (40) 9 (32)
2 Involved ALNs 5 6 (4) 1 (8) 1 (20) 9 (32)
6 3 (2) 0 (0) 1 (20) 10 (36)
The maximum size of involved ALNs     
5 mm 10(48) 5 (83) 0 (0) 0 (0)
5 mm < metastasis < 10 mm 7(33) 1 (17) 2 (50) 6 (21)
10 mm 4(19) 0 (0) 2 (50) 22(79)
Nuclear grade of involved ALNs     
Grade 1 and 2 16(76) 3 (50) 4 (100) 13(46)
Grade 3 5(24) 3 (50) 0 (0) 15(54)
Frequency of involved ALNs 15% 50% 80% 100%
Indications of ALND/PSC SNB FNAC/Bx is needed FNAC/Bx is needed Acceptable
Total 138 (100) 12 (100) 5 (100) 28 (100)
  1. AUS, Axillary ultrasound; ALN, Axillary lymph node; ALND, ALN dissection; PSC, Primary systemic chemotherapy; No., Number; pts, patients; FNAC, Fine needle aspiration