Musculoskeletal Flashcards
Most common cause of dwarfism
Achondroplasia
Most common cause of lethal skeletal dysplasia
Thanatophoric dwarfism
Most common arthritide
Osteoarthritis/ Degenerative Joint Disease
Most common site of osteochondrial lesion (osteochondritis dissecans)
Medial epidondyle of the knee
2nd MC - dome of talus
3rd MC - Capitellum of the elbow
Most common cause of disuse osteoporosis
Post-fracture
Most common cause of osteomalacia
Renal osteodystrophy
Most common disease in which osteosclerosis is seen
Renal osteodystrophy
Most common presentation of renal osteodystrophy
Osteopenia
Most common cause of hyperparathyroidism
Renal disease
Most common type of meniscal tear
Oblique tear
extending to the inferior surface of the medial meniscus
Most common torn ankle ligament
Anterior talofibular ligament
Most common shoulder dislocation
Anterior dislocation
Most common spine infection in adults
Staphylococcus aureus
Most common neoplastic condition involving the adult spine
Vertebral metastases
Most common spinal cord tumor in adults
Ependymoma
Most common spinal cord tumor in children
Astrocytoma
Most common intradural tumor in the thoracic region
Meningioma
Most common intraspinal mass
Schwannoma
Most common non-CNS tumor with the highest infiltration rate of the meninges
Leukemia
Second most common extradural mass
Neoplasm
Most common site for root avulsion in the spinal canal
Cervical spine
Most common cause of central canal and lateral recess stenosis
Degenerative disease of the facets with bony hypertrophy that encroaches the central canal
Most common cause of neuroforaminal stenosis
Degenerative joint disease of the facet with bony hypertrophy
Most common cause of of encroachment of the lateral recesses
Hypertrophy of the superior articular facet from degenerative joint disease
Most common pattern of joint space loss in osteodegenerative arthritis
Superior migration
Most common cervical spine segment involved in osteodegenerative arthritis
Intervertebral disc C5-C8
2nd MC - C6 -C7
Most common segment of degenerative anterior spondylolisthesis
L4-L5 in older women
Most common malignant primary bone tumor in children
Osteosarcoma
Most common malignant soft tissue neoplasm in adults
Malignant fibrous histiocytoma (fibrosarcoma)
2nd MC - Liposarcoma
Most common rotator cuff tear see on MRI
Rim rent tear
Most common benign lytic lesion of the phalenges
Enchondroma
Most common from of Langerhans cell histiocytosis
Eosinophilic Granuloma
Most common bone lesion
Nonossifying fibroma
