Berkoff
This tendon inserts on the superior facet of the greater tuberosity and is most commonly involved in degenerative rotator cuff tears.
What is the supraspinatus tendon?
Persistent groin pain with negative imaging and pain with resisted sit-up.
What is athletic pubalgia?
This intrinsic hip stabilizer originates from the external surface of the obturator membrane and inserts on the medial greater trochanter after exiting the pelvis via the lesser sciatic foramen.
What is the obturator internus muscle?
Athlete with dark urine, severe muscle pain, and CK >5,000 after intense workout.
What is exertional rhabdomyolysis requiring aggressive IV fluids?
This local anesthetic toxicity presents initially with perioral numbness, tinnitus, and seizures.
What is lidocaine (local anesthetic) systemic toxicity?
This shoulder MRI finding shows fluid extending between the superior labrum and glenoid at the biceps anchor.
What is a SLAP tear?
This fibrocartilaginous structure deepens the glenoid fossa and serves as the attachment for the long head of the biceps tendon.
What is the glenoid labrum?
This anatomic interval, bordered by the teres minor, teres major, long head of triceps, and surgical neck of humerus, transmits the axillary nerve.
What is the quadrilateral space?
MRI shows subchondral crescent sign in femoral head of a steroid-using athlete.
What is avascular necrosis requiring restricted weight bearing and referral?
This capsuloligamentous complex prevents posterolateral rotatory instability of the knee and includes the popliteus tendon, LCL, and popliteofibular ligament.
What is the posterolateral corner (PLC)?
This region of the proximal femur has retrograde blood supply and is most vulnerable to avascular necrosis after femoral neck fracture.
What is the femoral head (supplied by the medial femoral circumflex artery)?
MRI shows bone bruising of the lateral femoral condyle and posterolateral tibial plateau with intact ACL fibers but laxity on exam.
What is a partial ACL tear with functional instability?
Negative X-rays, persistent navicular tenderness, and pain with hop test.
What is MRI for suspected navicular stress fracture?
This structure is the primary restraint to anterior tibial translation between 20–30° of flexion and contributes secondarily to rotational stability.
What is the anteromedial bundle of the ACL?
This dynamic ultrasound maneuver demonstrates snapping of the iliopsoas tendon over the femoral head.
What is dynamic hip flexion/extension imaging for internal snapping hip?
Bone marrow edema in the lateral femoral condyle and posterolateral tibial plateau suggests this mechanism of injury.
What is a pivot shift/ACL injury/”kissing lesions” pattern?
This wrist stabilizer originates from the distal radius and inserts into the ulnar styloid, articular disc, and carpal bones, crucial for load transmission.
What is the triangular fibrocartilage complex (TFCC)?
Exertional leg pain, neurologic symptoms, and normal imaging but elevated post-exercise compartment pressures.
What is chronic exertional compartment syndrome?
Shoulder “dead arm” with abduction/external rotation, relieved by relocation test.
What is anterior shoulder instability?
This structure provides dynamic valgus restraint to the elbow and is commonly injured in overhead throwing athletes.
What is the ulnar collateral ligament (UCL), particularly the anterior bundle?
This pediatric knee condition presents with atraumatic limp and is associated with avascular necrosis of the femoral head.
What is Legg-Calvé-Perthes disease?
Athlete with mononucleosis and resolved symptoms but spleen still enlarged on exam.
What is restriction from contact sports due to splenic rupture risk?
This classic finding, seen in slipped capital femoral epiphysis, is when a line drawn along the femoral neck fails to intersect the epiphysis.
What is Klein’s line abnormality?
This nerve is most at risk during surgical approach to the fibular head and innervates ankle dorsiflexors.
What is the common peroneal (fibular) nerve?
MRI shows osteochondral lesion of talus with loose fragment and persistent symptoms.
What is surgical fixation or debridement?