History: 55 year old male with knee pain. This is a classic example of bone infarcts, here called osteonecrosis of the knee, which on radiographs is represented as a well defined sclerotic lesion with serpentine margins. In our example, the articular surfaces are mildly distorted, more so on the tibial plateau, causing collapse. On MRI, … Continue reading
The following images are from WikiRadiography (WetPaint) here .
The following images are from WikiRadiography (WetPaint) here. See a pediatric femur fracture here.
History: child with elbow pain. This is an example of a lateral epicondyle avulsion fracture in a child, which is a very rare epicondyle fracture and much less common than medial epicondyle fractures. A lateral epicondyle fracture is due to an avulsion of the lateral epicondyle by excessive force from the common extensor tendon, which … Continue reading
History: child with left shoulder pain after bicycle accident. This is a typical clavicle fracture in children with mild apex cephalad (pointing upward towards the head) angulation. This clavicle fracture actually exhibits full thickness break through the bone cortex, but children can frequently have incomplete fractures. These are referred to as buckle fractures (or torus … Continue reading
History: Male with foot mass. This is a nice example of a giant cell tumor of tendon sheath, which essentially is a benign proliferation of synovium within the tendon sheath. Giant cell tumors of tendon sheath (GCTTS) are the second most common benign tumors in the fingers after ganglion cysts. On MRI as shown above, … Continue reading
The following images are from WikiRadiography (WetPaint) here. See more differences between the male and female pelvis.
History: 35 year old male with hand pain. This is a classic appearance of an enchondroma in a phalanx on radiographs. An enchondroma is a benign cartilaginous tumor that arises from the medullary space of the bone. Enchondromas are the second most common benign tumor of bones (after osteochondroma) and most common benign tumor of … Continue reading
This mnemonic has been commonly used to recall the differential diagnosis for gracile bones – NIMROD N – Neurofibromatosis I – Immobilization (Paralysis) M – Muscular Dystrophy R – Rheumatoid Arthritis O – Osteogenesis Imperfecta (click the link or see below) D – Dysplasias (Marfan’s syndrome, Homocystinuria)
This mnemonic has been commonly used to recall the tendons of the pes anserinus (which means “gooses foot” in Latin): “Say Grace before Tea” S – Sartorius G – Gracillis T – Semitendinosus Learn about pes anserine bursitis here. Briefly, pes anserine bursitis is a condition of inflammation around the medial knee which usually presents with … Continue reading