Seen on STIR coronal images and symphyseal cleft injection
Primary cleft: Midline single physiological cleft in the symphysis pubis on contrast injection or MR imaging is normal
Secondary cleft: Usuallu seen in the inferolateral aspect of the pirmary cleft and usually continuous with the primary cleft
What it means: Groin injury, seen commonly in athletes. In all sports injury secondary cleft sign is an important indicator of groin injury. The common causes include Gilmore hernia, osteitis pubis, tendonitis or avulsion of adductor origin, or combination of these conditions
References:
Brennan D et al. Secondary Cleft Sign as a Marker of Injury in Athletes with Groin Pain: MR Image Appearance and Interpretation. Radiology 2005;235:162-167
