Petersson graded degeneration of cartilage as seen in imaging studies.
Parameters:
(1) depth of degenerative changes
(2) specific findings
Depth of Changes
Specific Findings
Grade
superficial
blister formation, some fragmentation
I
deep
greater fragmentation and blister formation, penetrating ulceration with an irregular shape
II
full-thickness
denuding of subchondral bone > 50% of the joint space
III
Degenerative changes tend to increase with age and are common in adults over 70.
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Specialty: Surgery, orthopedic
