Magnetic resonance imaging findings of carcinoma arising from anal fistula: A retrospective study in a single institution

Table 1 Patient demographics and symptoms

Item	Data
Age (yr)	59 ± 12 (31–75)
Sex	Male (n = 8); Female (n = 2)
Pathological subtypes	Mucinous adenocarcinoma (n = 8); Adenocarcinoma (n = 2); Squamous cell carcinoma (n = 0)
Clinical symptoms	Persistent fistula (n = 10); Pain (n = 5); Discharging (n = 5); Enlarging mass (n = 1); Hematochezia (n = 1)
Duration of anal fistula	≤ 10 yr (n = 4); > 10 yr (n = 6)
History of operation	Yes (n = 10); No (n = 0)