From: Prognostic parameters for recurrence of papillary thyroid microcarcinoma
Baseline characteristics | Surgical extent | Tumor multifocality | Overall | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Total or near-total (n = 173) | Hemi- or subtotal (n = 134) | P valuea | Multifocal (n = 98) | Solitary (n = 209) | P valuea |  |  | ||||
Age at operation (> 45 yrs) | 95 | (55) | 54 | (40) | 0.01 | 53 | (54) | 96 | (46) | 0.22 | 149 | (49) |
Gender (male) | 16 | (9) | 16 | (12) | 0.46 | 9 | (9) | 23 | (11) | 0.69 | 32 | (10) |
Tumor size | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   ≤ 0.5 cm | 29 | (17) | 20 | (15) | 0.07 | 9 | (9) | 40 | (19) | 0.04 | 49 | (16) |
   > 0.5 cm and ≤ 0.8 cm | 63 | (36) | 66 | (49) |  | 40 | (41) | 89 | (43) |  | 129 | (42) |
   > 0.8 cm | 81 | (47) | 48 | (36) |  | 49 | (50) | 80 | (38) |  | 129 | (42) |
Multifocal tumor | 84 | (49) | 14 | (10) | < .001 | N/A | N/A | N/A | 98 | (32) | ||
Bilateral tumor | 57 | (33) | N/A | Â | 57 | (69) | N/A | N/A | 57 | (19) | ||
Extrathyroid extension | 77 | (45) | 39 | (29) | 0.006 | 47 | (48) | 69 | (33) | 0.02 | 116 | (38) |
Lymph node metastasis | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   pNx | 17 | (10) | 27 | (20) | < 0.001 | 13 | (13) | 31 | (15) | 0.03 | 44 | (14) |
   pN0 | 64 | (37) | 60 | (45) |  | 30 | (31) | 94 | (45) |  | 124 | (40) |
   pN1ab | 68 | (39) | 47 | (35) |  | 43 | (44) | 72 | (34) |  | 115 | (37) |
   pN1bc | 24 | (14) | 0 |  |  | 12 | (12) | 12 | (6) |  | 24 | (8) |
Remnant ablation | 163 | (94) | N/A | Â | 81 | (83) | 82 | (39) | < .001 | 163 | (53) | |
Total or near-total thyroidectomy | N/A | N/A | Â | 84 | (86) | 89 | (43) | < .001 | 173 | (56) |