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Table 1 Clinical features of patients with pyriform sinus fistula

From: Outcomes of endoscopic chemo- and laser-cauterizations and open fistulectomy for pyriform sinus fistula

  Overall cohort (n = 83) Endoscopic treatment (n = 74) Open fistulectomy (n = 9) p value
Age at the first episode (years)# 10 (1–50) 8.5 (5–18) 15 (9.5–46) n.s
Age at the first treatment at our institute (years)# 16 (4–62) 14.5 (7–24) 35 (15–54.5) *p = 0.011
Sex: Female/male 32/51 29/45 3/6 n.s
Laterality     
 Left 76 (91.6) 68 (91.9) 8 (88.9) n.s
 Right 6 (7.2) 5 (6.8) 1 (11.1)  
 Bilateral 1 (1.2) 1 (1.4) 0 (0.0)  
Number of inflammation episodes     
 Once 31 (37.3) 30 (40.5) 1 (11.1) n.s
 Twice 21 (25.3) 16 (21.6) 5 (55.6)  
 ≥ 3 31 (37.3) 28 (37.8) 3 (33.3)  
Clinical manifestations     
 Abscess 47 (56.6) 44 (59.5) 3 (33.3) n.s
 Reddish swelling 34 (41.0) 29 (39.2) 5 (55.6)  
 Simple mass 2 (2.4) 1 (1.4) 1 (11.1)  
History of incisional drainage     
 None 45 (54.2) 40 (54.1) 5 (55.6)  
 Once 25 (30.1) 23 (31.1) 2 (22.2) n.s
 ≥ 2 13 (15.7) 11 (14.9) 2 (22.2)  
 Previous fistulectomy 14 (16.9) 13 (17.6) 1 (11.1) n.s
  1. # indicates median (ranges), other parentheses indicate %, n.s not significant