Knee Fat Pad Volumes in Patients with Hemophilia and Their Relationship with Osteoarthritis

Figure 1

T1-weighted MR images showing different infrapatellar fat pad (IPFP) and suprapatellar fat pad (SPFP) appearances. (a) 48-year-old man with severe hemophilia B demonstrates an enlarged IPFP with prominent extension into the distended lateral patellofemoral recess (arrow). (b) 70-year-old man with mild hemophilia A shows a more regular appearance of the IPFP with only mild extension into the lateral patellofemoral recess (arrow). (c) 38-year-old man with severe hemophilia A demonstrates an enlarged and irregular SPFP (arrow). (d) 67-year-old man with mild hemophilia A shows a more regular appearance of the SPFP (arrow).

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