The End of Transient Osteoporosis of the Hip?

This lecture, originally presented to the Vancouver Bone Squad (VBS), provides a comprehensive dive into why the diagnosis of Transient Osteoporosis of the Hip (TOH) is likely a relic of the past. Dr. Agten explores the history and terminology of bone marrow edema syndrome, subchondral insufficiency fractures (SIF), and early avascular necrosis (AVN). Through modern high-resolution imaging and recent research, the video argues that what we once called "transient osteoporosis" is actually a subchondral insufficiency fracture that was simply invisible on older MRI scanners. Key Topics Covered: The TOH vs. SIF Debate: Why the clinical presentation, histopathology, and treatment for these two "different" entities are identical. The Evolution of MRI: How improved image resolution in 2026 allows us to see fracture lines that were previously missed. Differential Diagnosis: How to distinguish subchondral insufficiency fractures from early-stage AVN (and why early AVN doesn't typically show bone marrow edema). Radiological Signs: A deep dive into the "medial bone marrow sparing sign" and its anatomical explanation. Case Studies: Real-world examples from the MSK Fellowship, demonstrating subtle fracture lines and the importance of unilateral high-resolution imaging. Latest Research: A look at a 2024 study that identified subchondral fractures in 88% of cases previously diagnosed as TOH. Watch this video if: You are a radiologist or orthopedic surgeon dealing with hip pain and bone marrow edema findings. You want to simplify your diagnostic framework for femoral head pathologies. You’re curious about why medical nomenclature changes as technology advances. Case Index: [00:34:07] Case 1: Post-trauma increasing hip pain. [00:36:04] Case 2: 52-year-old female with groin pain. [00:38:14] Case 3: Severe hip pain with no trauma history. [00:40:19] Case 4: 35-year-old male (the "Table Tennis" case). [00:42:59] Case 5: 51-year-old male with persistent pain. Join the Community: Scan the QR code at the end of the video to join our free MSK Radiology community on Skool for more discussions and cases. #Radiology #MSKRadiology #HipMRI #MedicalEducation #RadiologyLecture #VancouverBoneSquad #Orthopedics I am a radiologist, specialized in musculoskeletal imaging (MRI). I help other radiologists and healthcare professionals to become better and more confident in MRI interpretation and reporting. I teach anatomy, strategy, search patterns and use a case based teaching approach. My Links: Free MSK Radiology Online Community www.skool.com/mskrad My personal page: www.agten.org Like the Youtube videos? Support me on www.patreon.com/c/agten My best-selling book SPEED - MSK Radiology: www.agten.org/speed My book "The Confident Radiologist": www.agten.org/confidence