Radiology - Conditions (Subscribe)  

Bilateral, symmetric sclerosis of the iliac side of the sacro-iliac joint is present in this young female, who presents with an unrelated history (motor vehicle accident). The sclerosis appears triangular with the base located inferiorly. Erosions are absent. some facts concerning Osteitis Condensans Ilii: Symmetric sclerosis of the iliac side...

secondary to hypocalcemia and hyperphosphatemia followed by increased parathormone production
* subperiosteal bone resorption
o radial aspect of phalanges, distal clavicle, medial tibia plateau, medial humerus neck, distal ulna, phalangeal tufts, lamina dura of teeth
* subchondral and subligamentous bone resorption
...

Radiology case 451-442
Clinical presentation: 13 year old male with pain in the knees. There are almost symmetrical defects of the articular surfaces on the medial side of the lateral condyles of both femora. On the left side the separated bone remains close to its site of origin. In the right knee,...

* age: 10 - 30 yrs
* bony outgrowth
* points away from joint
* site: metaphysis; long bones
o 50% at knee or shoulder
* generally benign
o calcified cartilagenous cap ==> premalignant
...

Osteochondromas are cartilage-covered, histologically normal bony projections (exostoses) on the external surface of a bone in the vicinity of growth plates. They are the most common benign bone lesions and present during late childhood and adolescence. Although any bone with enchondral ossification may be involved, the femur, the proximal tibia,...

degeneration followed by reossification of one or more ossification centers in children
* Legg-Calve-Perthes disease (capital femoral epiphysis)
* Kohler disease (tarsal navicular)
* Osgood-Schlatter disease (tibial tuberosity)
* Scheuermann disease (vertebral ring epiphyses)
* Freiberg infraction (metatarsal head)
* Sever disease (apophysis of os calcis)
* osteochondritis dissecans

osteochondrosis (aka osteochondritis) dissecans
subchondral fatigue fracture commonly seen in adolescents
1. capitellum of elbow
2. knee
* medial femoral condyle close to fossa intercondylaris
* bilateral in 20-30%, rarely lateral
3. talus
* mouse = osteochondrotic fragment
* mouse bed = sclerosed pit in articular surface

ACR-code 451-3182 2 cases
Clinical presentation: 22 year old female with pain in the left knee. There is a destructive bone lesion in the distal metaphysis and lateral condyle of the left femur. It extends to the joint surface and has eroded the cortex and extends laterally with a soft tissue bulge...

Radiology case 431-3182 Clinical presentation: 35 year old male with wrist pain.
There is a solitary, expanding, multi-loculate, well-defined lesion in the distal metaphysis of the right radius, extending almost to the joint surface. The lesion is crossed by numerous strands of dense bone, consistent with the loculation and partial septation. The...

Radiology case 432-3182 Clinical presentation: Mature adult with recent onset of wrist pain.
The distal ulna is expanded by a cyst-like tumour, adjacent to the joint. It is a solitary, expanding, multi-loculate, well-defined lesion. The endosteal margin is visible and well-defined with a narrow zone of transition between normal and abnormal bone....

Radiology case 455-3182 Clinical presentation: 50 year old woman with pain in the knee.
The skeleton is mature with visible osteoarthrosis. There is an expanding lesion of the head of the fibula. It thins the overlying bone to the point of invisibility. The lesion extends to the margin of the joint between...

Radiology case 423-3182 Clinical presentation: Female aged 49 years, sudden onset of pain in the left elbow, after a fall.
There is a pathological fracture of the olecranon of the left ulna, through a lytic lesion in the bone. The cyst-like lesion lies immediately adjacent to the elbow joint and has a...

Radiology case 4411-3182 Clinical presentation: Mature adult female with pain in 'right hip'.
The skeleton is a mature one. There is an expanding lytic lesion of the right ilium. It lies adjacent to an apophysis, the anterior superior iliac spine. The expoanding lesion thins the overlying cortex almost to the point of...

Radiology case 454-3182 2 cases
Painless swelling of the knee in a young woman. There is a lytic process in the tibia. Note that the expanding lesion extends to the joint and is in a mature skeleton. Its centre of radius is not in the middle of the bone, the involvement is...

"brittle bone disease": abnormalities of collagen/collagen production
Type I
autosomal dominant
age at presentation: 2-6 years
Type II (congenital lethal OI)
autosomal recessive...