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Table 2 Particularities of papillary thyroid carcinoma associated with PHPT or SHPT

From: Coexistent papillary thyroid carcinoma diagnosed in surgically treated patients for primary versus secondary hyperparathyroidism: same incidence, different characteristics

  PHPT SHPT p
No. cases (%) No. cases (%)
Papillary thyroid carcinoma (PTC) 19   9   0.517
 Classic variant of PTC 14 (73.6) 8 (88. 9)
 Follicular variant of PTC 4 (21.1) 1 (11.1)
 Oncocytic variant of PTC 1 (5.3)
T (tumor) classification
 T1 (a and b) 13 (68.4) 9 (100)  
 T2
 T3 (a and b) 6 (31.6)
 T4
N (lymph node) classification 0.466
 Nx 13 (68.4) 4 (55.6)
 N0 5 (26.3) 5 (44.4)
 N1 1 (5.3)
Maximum tumor diameter
  < 10 mm (microcarcinoma) 12 (63.1) 9 (100)  
  ≥ 10 and < 20 mm 3 (15.8)
  ≥ 20 and < 40 mm 1 (5.3)
  ≥ 40 cm 3 (15.8)
Mean tumor size [mm] 13.6 ± 18.4   2.7 ± 2.1   0.005
Multifocality 4 (21.1) 1 (11.1) 0.507