Table 2.
MRI features according to each intrinsic subtype
| LA | n-LA | LB | n-LB | LH2 | n-LH2 | H2 | n-H2 | TN | n-TN | |
|---|---|---|---|---|---|---|---|---|---|---|
| MRI findings | (n = 24) | (n = 92) | (n = 15) | (n = 101) | (n = 14) | (n = 102) | (n = 23) | (n = 93) | (n = 40) | (n = 76) |
| Mass margin | ||||||||||
| Smooth | 7(29) | 52(57) | 7(47) | 52(51) | 6(43) | 53(52) | 15(65)b | 44(47) | 24(60) | 35(46) |
| Irregular | 17(71)a | 40(43) | 8(53) | 49(49) | 8(57) | 49(48) | 8(35) | 49(53) | 16(40) | 41(54) |
| aP = .005 | bP = .032 | |||||||||
| Intratumoral necrosis | ||||||||||
| Presence | 4(17) | 17(18) | 3(20) | 18(18) | 0(0) | 21(21) | 2(9) | 19(20) | 12(30)c | 9(12) |
| Absence | 20(83) | 75(82) | 12(80) | 83(82) | 14(100) | 81(79) | 21(91) | 74(80) | 28(70) | 67(88) |
| cP = .019 | ||||||||||
| Tumor extension around mass | ||||||||||
| Presence | 17(71) | 69(75) | 7(47) | 79(78) | 10(71) | 76(75) | 21(91)e | 65(70) | 31(78) | 55(72) |
| Absence | 7(29) | 23(25) | 8(53)d | 22(22) | 4(29) | 26(25) | 2(9) | 28(30) | 9(22) | 21(28) |
| dP = .0047 | eP = .009 | |||||||||
| Kinetic curve pattern | ||||||||||
| Washout | 5(21) | 37(40) | 8(53) | 34(34) | 5(36) | 37(36) | 14(61) | 28(30) | 10(25) | 32(42) |
| Plateau | 14(58) | 44(48) | 6(40) | 52(51) | 8(57) | 50(49) | 6(26) | 52(56) | 24(60) | 34(45) |
| Persistent | 5(21) | 11(12) | 1(7) | 15(15) | 1(7) | 15(15) | 3(13) | 13(14) | 6(15) | 10(13) |
LA luminal A, n-LA non-luminal A, LB luminal B, n-LB non-luminal B, LH2 luminal-HER2, n-LH2 non-luminal-HER2, H2 HER2, n-H2 non-HER2, TN triple-negative, n-TN non-triple-negative.
a,b,c,d,eIndicates statistical significance (P < .05).