Superolateral Hoffa´s fat pad edema as an indirect sign of patello-femoral structural abnormalities, case-control study.

Congress:

ESSR 2015

Poster Number:

P-0139

Type:

Scientific Poster

Keywords:

Image verification, Oedema, Dysplasias, Imaging sequences, MR, Musculoskeletal soft tissue, Musculoskeletal joint, Musculoskeletal bone

Authors:

A. M. Refaat, A. Al-Taie, M. Khanna, O. M. Osman, S. I. Alam; Doha/QA

DOI:

10.1594/essr2015/P-0139

DOI-Link:

https://dx.doi.org/10.1594/essr2015/P-0139

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Purpose

To study the relationship between the presence of edema in the superolateral Hoffa’s fat pad and the presence of patello-femoral structural abnormalities. To emphasis on the importance of this finding which can be subtle, overlooked, missed or ignored.

Methods and Materials

Retrospective case-control study done on 40 cases with positive Hoffa’s fat pad edema on MRI and 39 control cases in Hamad General Hospital, Qatar. Both groups analyzed for: 1. Chondromalacia patellae. 2. Patellar tendon-patellar length ratio (Insall-Salvati): normal 0.8-1.3. 3. Ventral Trochlear Prominence: ≤ 3 mm is normal, > 3 mm is abnormal. 4. Tibial Tuberosity to Trochlear groove distance N: ≤ 10 mm, > 10 mm is abnormal. 5. Trochlear sulcus depth: N: ≥ 3mm, < 3 mm is abnormal 6. Lateral patellofemoral angle...

Results

Chondromalacia was found in 33 cases of positive Hoffa’s fat pad edema (82.5%) and in 7 cases of the control group (17%). (P. value 0.001). Abnormal measurement of Patellar tendon-patellar length ratio (>1.3; patella alta) was found in 19 cases of positive Hoffa’s fat pad edema (47.5 %) and in 2 cases of the control group (5%). (P. value 0.001). Abnormal measurement of Ventral Trochlear Prominence (> 3 mm) was found in 27 cases of positive Hoffa’s fat pad edema (67.5 %) and in 10...

Conclusion

Superolateral Hoffa's fat pad edema: Is an important indicator of underlying patellar mal-tracking /dysplasia May predispose to development of Chondromalacia patellae in young age.

References

1.Subhawong TY.T ,John A Carrino Avneesh Chhabra -Superolateral Hoffa's fat pd edema ;Association with patellofemoral Maltraking and impingement. AJR:195, December 2010 2.campagana R,Pessis E,Biaua D J ,Guerini H,Feydy A;Is Superolateral Hoffa Fat Pad Edema a Consequence of Impingement between Lateral Femoral Condyle and Patellar Ligament? Radiology May 2012 263:2 469-474; Published online March 6, 2012, 3.Saddik D, McNally EG, Richardson M. MRI of Hoffa's fat pad. Skeletal Radiol. 2004;33:433-444 4.Jacobson JA, Lenchik L, Ruhoy MK, Schweitzer ME, Resnick D. MR imaging of the infrapatellar fat...

Personal Information

1-A. M. Refaat, Radiology resident,Hamad Medical Hospital, Hamad medical corporation, Doha, Qatar. 2-A. Al-Taie,Musculoskeletal Radiology fellow, Hamad Medical Hospital, Hamad medical corporation, Doha, Qatar. 3-S. I. AlamHamad,Musculoskeletal Radiology specialist,Medical Hospital, Hamad medical corporation, Doha, Qatar.