"Rohena-Quinquilla et al. assessed femoral neck bone stress injuries in U.S Army soldiers in order to adequately address management and return-to-duty time. Grading is broken down into degree of endosteal bone marrow oedema and presence/absence of a macroscopic T1 fracture line6:"
"grade 1: endosteal bone marrow oedema less than or equal to 6mm in thickness on STIR sequences without visible fracture line on T1WI"
"grade 2: endosteal bone marrow oedema greater than 6mm in thickness on STIR sequences without visible fracture line on T1WI"
"grade 3: endosteal bone marrow oedema and macroscopic fracture line on T1WI measuring less than 50% of the femoral neck width"
"grade 1: endosteal bone marrow oedema less than or equal to 6mm in thickness on STIR sequences without visible fracture line on T1WI"
"grade 2: endosteal bone marrow oedema greater than 6mm in thickness on STIR sequences without visible fracture line on T1WI"
"Femoral Neck Stress Injuries (FNSI) grading system"
Expected headings
"Classification"
"Fredericson grading system"
"Arendt grading system"
"Nattiv grading system"
"Femoral Neck Stress Injuries (FNSI) grading system"
"grade 3: positive marrow signal change on STIR, T2WI and T1WI, no definite cortical break"
"report the findings in a descriptive manner, adding in brackets the grade and the author of a grading system (e.g. Arendt grade 3 bone stress injury)"