• • Bone marrow reconversion: Signal intensity is that of normal red marrow being low T1 signal but still higher than skeletal muscle. Marrow reconversion occurs in the reverse order of normal red to yellow marrow conversion.

• • Physiological (e.g. cigarette smoking, obesity, high altitude), iatrogenic (e.g. post erythropoietin treatment), pathological (e.g. diabetes mellitus, severe chronic anaemia).

• • Obesity (BMI 35)

• • https://radiopaedia.org/articles/bone-marrow-reconversion

Adhesive capsulitis

There is a thickening and edema of the inferior joint capsule in the axillary recess which is characteristic of adhesive capsulitis.

Additionally, there is an interstitial tear of supraspinatus tendon.

Explanation:

Adhesive capsulitis, also known as frozen shoulder, is an inflammatory condition characterized by shoulder stiffness, pain, and significant loss of passive range of motion.
The joint capsule exhibits inflammation, thickening and fibrosis, leading to pain and loss of ROM.
In most cases, adhesive capsulitis is a self-limited disease with high spontaneous recovery rates within 18 to 30 months.

Pellegrini-Stieda lesion

There is an ossified lesion adjacent to medial femoral condyle, at the insertion of medial collateral ligament (MCL).

MCL fibers are intact.

No signs of osteoarthritis.

Slight degenerative changes within the body of medial meniscus.

Explanation:

Pellegrini-Stieda lesions are defined as post-traumatic ossifications of the medial collateral ligament (MCL) at or near its proximal insertion on the medial femoral condyle.
Pellegrini-Stieda disease (or syndrome) is defined as the combination of the radiographic findings and concomitant medial knee joint pain or restricted range of motion.

• Undisplaced scaphoid fracture

• Acute boxer’s fracture

• Dorsal avulsion fracture of the triquetrum

• No abnormality

• Undisplaced scaphoid fracture – FALSE

• Acute boxer’s fracture – FALSE

• Dorsal avulsion fracture of the triquetrum (Red arrow) – TRUE

• No abnormality – FALSE

Explanation:

• Notice also the dorsal soft tissue swelling with air lucencies (Located inside the orange line).






Triquetral fractures:

• Second most common carpal bone fracture (after the scaphoid)

• Fall onto an outstretched hand in ulnar deviation and carpal extension or direct blow to the dorsum of the hand (latter in this case)

• Almost always dorsal avulsion type

• Usually only seen on lateral radiographs with the classic “pooping duck” sign

• Deep lateral notch (sulcus) sign on lateral projection

• Suprapatellar effusion

• MRI of the knee, due to high index of suspicion for ACL tear

Full-thickness ACL tear

• Patient had additional abnormalities of the knee not shown.

Capitellum fracture

The case represents a classic capitellum fracture, with a mildly displaced fragment on the lateral projection, which can easily be missed if one is not familiar with the double-arc sign.

D3/D4 intermetatarsal space

What is the most likely diagnosis?

Near-complete rupture of the right hamstring tendons with moderateretraction and preserved muscle bellies

Reference: https://radiologyassistant.nl/musculoskeletal/muscle/hamstring-injury