Fibrous dysplasia (Rind sign)
Last updated by drk on 09/28/2009 03:00 AM (Read: 6876 times)
Classically, fibrous dysplasia lesions are intramedullary, expansile, and well defined lucent lesion in the diaphysis or metaphysic ("long lesion in long bone"). Although endosteal scalloping may be present, a smooth cortical contour is always maintained (absence of periosteal reaction). Lesions show varying degrees of hazy density with a ground-glass quality, although some may appear almost completely radiolucent or sclerotic. The lesion may be surrounded by a layer of thick, sclerotic reactive bone termed a rind. The classic rind is most commonly seen in proximal femur.
[
Images] 157 more words - 1 page
Print 
Email
Erosive (inflammatory) osteoarthritis
Last updated by drk on 09/21/2009 03:00 AM (Read: 8020 times)
Erosive osteoarthritis is typically bilateral and symmetrical, and it occurs in the interphalangeal, particularly distal interphalangeal, joints of the hands. The disease most commonly occurs in postmenopausal women, and it may be hereditary. The erosions are centrally located in contrast to the marginal erosions in rheumatoid arthritis. Joints assume a gull-wing configuration, with central erosions flanked by raised lips of bone.
[
Images] 232 more words - 1 page
Print Email
Tuft fracture in the ring finger - Bone sarcoidosis
Last updated by drk on 09/20/2009 06:11 PM (Read: 31076 times)
Skeletal involvement is seen in approximately 5% - 10% of patients with sarcoidosis. The phalanges in the hands and feet are most frequently affected. Radiologic features are characterized by cystic or lacelike appearance which is bilateral in distribution, usually at the ends in small bones (hands and feet). The articular spaces are usually intact, unless extensive lesions (punched-out lesions) develop. Calcification is absent. A subcutaneous soft-tissue mass or tenosynovitis may also be present.
[
Images] 290 more words - 1 page
Print Email
Absent semimembranosus muscle
Last updated by drk on 07/28/2009 03:00 AM (Read: 3628 times)
Semimembranosus muscle may be reduced or absent, quite large or double in which case arising mainly from the sacrotuberous ligament giving a slip to the femur or adductor magnus.
[
Images] 179 more words - 1 page
Print Email
Insufficiency fracture of sacrum and iliac bone
Last updated by drk on 07/16/2009 04:49 PM (Read: 11040 times)
Insufficiency fracture is a subgroup of stress fracture caused by the effect of normal or physiologic stress upon weakened bone.
[
Images] 318 more words - 1 page
Print Email
