Subchondral insufficiency fracture

Changed by Mostafa Elfeky, 4 Aug 2019

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A subchondral insufficiency fracture refers to a type of stress fracture that occurs below the chondral surface on a weight-bearing surface of a bone.

Pathology

They tend to occur when normal physiological forces are repeatedly applied to an area of bone.

Location

Typical sites include

knee: ~~previously referred~~can progress to as spontaneous osteonecrosis of the knee⁵
femoral head
metatarsal head

Radiographic features

MRI

T1: may be characteristically low signal intensity band through the affected region
T2: florid marrow oedema

Image 4 MRI (STIR) ( update )

Caption was changed:

Case 4: metatarsal head

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