Discoid lateral meniscus

Case contributed by Dr Ammar Haouimi

Presentation

Locking right knee.

Patient Data

Age: 8 years
Gender: Male
MRI

There is an abnormal body width of the lateral meniscus (>20 mm) on coronal sequences, visible in more than three images on sagittal sequences with an intrinsic high STIR (degenerative).

The medial meniscus appears normal.

Case Discussion

MRI features of a discoid lateral meniscus. Discoid menisci are of congenital origin, usually affecting the lateral meniscus, bilateral up to 50%,  prone to cystic degeneration with subsequent tear (due to decreased collagen fibers within the discoid meniscus).

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Case information

rID: 74321
Published: 16th Feb 2020
Last edited: 18th Feb 2020
Inclusion in quiz mode: Included
Institution: Aurès Medical Imaging Center - Batna Algeria

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