Persistent intercruciate septum: a normal knee variant not to overcall

Persistent intercruciate septum is a benign embryological band between ACL and PCL, seen as a low-signal structure on MRI. Recognize it to avoid mistaking for a displaced meniscal fragment or anomalous vessel.

• It is a normal variant, a remnant of the embryological intercondylar septum.
• On MRI, it appears as a distinct low-signal band extending from the ACL origin to the PCL insertion.
• Do not confuse it with a displaced meniscal fragment or an anomalous vessel.

RadPigeon summaries are original and for information only. They are not clinical advice.