Assessment of stricturing Crohn's disease: Current clinical practice and future avenues

Table 1 Classification system of Crohn’s disease-associated strictures developed by Paine and Shen[30]

Criteria	Classification
Etiology	Primary vs secondary (anastomotic); benign vs malignant
Number	Single vs multiple
Degree	High grade vs low grade
Shape	Web like vs spindle shaped; circumferential vs asymmetric
Length	Short vs long
Location	Esophagus, pylorus, small bowel, ileocecal valve, anastomosis, colon, rectum, anus
Associated conditions	Fibrosis, edema, proximal dilation, ulceration, fistula with or without abscess, angulated, prior strictureplasty