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13 Cards in this Set
- Front
- Back
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Unicameral bone cyst?
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A simple bone cyst in the metaphysis of proximal humerus or femur.
Generally in patients <20 yo. |
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Fibroxanthoma?
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A very common abnormal proliferation of fibrous tissue in long bones of children.
Associated with pathological fracture if: 1. size is >50% of diaphysis diameter. 2. longitudinally >22 mm. |
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Fibrous dysplasia?
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Replacement of medullary bone with fibrous tissue. Commonly involves facial or cranial bones.
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Eosinophilic granuloma?
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AKA: hisitocytosis X, Langerhan histiocytosis.
Painful bone swelling, skull > long bones. Can infiltrate lymph nodes, bone marrow. Therefore associated with pancytopenia, skin lesions, splenomegaly, lymphadenopathy. |
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Osteosarcoma?
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Most common primary bone tumor.
Usually found in metaphysis of long bones, most commonly around the knee. Presents classically with bone pain that is worse at night. |
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Ewing's Sarcoma?
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Disease of teenage males, commonly of pelvis and proximal tubular bones.
t(11:21) Onion skinning + sunburst. |
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Lab values for osteoporosis?
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Serum Ca: normal
Serum P: normal Serum AlkP: normal Urine findings: normal Ca |
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Lab values for osteomalacia?
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Serum Ca: normal
Serum P: normal Serum AlkP: normal Urine findings: low Ca |
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Lab values for hyperparathyroidism?
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Serum Ca: normal to high
Serum P: normal to low Serum AlkP: normal Urine findings: high Ca |
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Lab values for renal osteodystrophy?
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Serum Ca: low
Serum P: high Serum AlkP: high Urine findings: - |
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Lab values for paget's disease?
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Serum Ca: normal
Serum P: normal Serum AlkP: very high Urine findings: hydroxyproline |
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Treatment of pathological fractures?
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Non Operative: for primary benign lesions. Slow to heal.
Operative: internal fixation ± cement. |
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Mirel's criteria?
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Criteria for risk of fracture. Summation of site, pain, lesion type, size. If >7, prohpylactic internal fixation.
Site: 1 - upper arm 2 - lower extremity 3 - peritrochanteric Pain: 1 - mild 2 - moderate 3 - severe Lesion: 1 - blastic 2 - mixed 3 - lytic Size: 1 - <1/3 diameter of bone 2 - 1/3 - 2/3 diameter of bone 3 - >1/3 diameter of bone |
