Mavrogenis et al developed a classification for neurogenic heterotopic ossification of the hip. The authors are from the University of Bologna.
Patient selection: heterotopic ossification (HO) of the hip due to neurogenic cause
Basic features:
(1) neurogenic cause
(2) hip or proximal end of femur
(3) with or without ankylosis
Parameters:
(1) location
(2) cause
Cause |
Type |
anterior |
1 |
posterior |
2 |
anterior and medial |
3 |
circumferential (wraps around) |
4 |
Cause |
Subtype |
spinal cord injury |
a |
brain injury |
b |
where:
• One modification might be to add a “c” subtype for other neurogenic cause
• Another modification might be to designate ankylosis.
The final designation is the Type and Subtype.
Specialty: Surgery, orthopedic