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Table 1 Clinicopathological characteristics of 24 cases of PASTs

From: Clinicopathological characteristics and prognosis of primary appendiceal stromal tumors

Characteristics N(%)
Age (year)/(Σ = 24)
 <59 11(45.8)
 ≥ 59 13(54.2)
Sex (Σ = 24)
 Male 14(58.3)
 Female 10(41.7)
Tumor size (cm)/(Σ = 24)
 ≤ 2 11(45.8)
 2.1–5.0 1(4.2)
 5.1–10 8(33.3)
 >10 4(16.7)
Gross type (Σ = 24)
 Solid 20(83.3)
 Mixed 4(16.7)
 Cystic 0(0.0)
Histologic type (Σ = 24)
 Spindle 21(87.5)
 Epithelioid 2(8.3)
 Mixed 1(4.2)
Lymph node metastasis (Σ = 24)
 Yes 1(4.2)
 No 23(95.8)
Mitotic index(%)/(Σ = 17)
 ≤ 5 14(82.4)
 >5 3(17.6)
Ki-67(%)/(Σ = 6)
 <5 4(66.7)
 ≥ 5 2(33.3)
Immunohistochemistry (Σ = 24)
 CD117 (Σ = 24) 23(95.8)
 CD34 (Σ = 20) 15(75.0)
 DOG-1 (Σ = 5) 3(60.0)
 SMA (Σ = 17) 4(23.5)
 S-100 (Σ = 24) 7(29.2)
Mutational status (Σ = 5)
 Kit 3(60.0)
 PDGFRA 0(0.0)
 Wild type 2(40.0)
 SDHB 0(0.0)
NIH risk category (Σ = 24)
 Very low risk 11(45.8)
 Low risk 2(8.3)
 Intermediate risk 4(16.7)
 High risk 7(29.2)
Rupture (Σ = 24)
 Yes 2(8.3)
 No 22(91.7)
Ulceration (Σ = 24)
 Yes 1(4.2)
 No 23(95.8)
Symptoms (Σ = 24)
 Appendicitis 14(58.3)
 Abdominal distension or pain or mass 17(70.8)
 Hematochezia or anemia 3(12.5)
 Nausea or emesis 3(12.5)
 Others 6(25.0)
  1. PASTs primary appendiceal stromal tumors, NIH National Institute of Health