(SAE07PE.9) A 13-year-old girl is referred for a painful progressive valgus deformity of the right knee. Examination reveals an antalgic gait with an obvious valgus deformity. The right distal femur has a palpable, tender mass with erythema and warmth. Figures 4a and 4b show a clinical photograph and a radiograph. Management should consist of Tested Concept

QID: 6069

FIGURES:

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needle biopsy of the distal femur.

15%

(31/206)

open reduction and internal fixation with a locking plate.

(1/206)

closed reduction and fixation with a reamed antegrade locking intramedullary nail.

(1/206)

referral to an orthopaedic oncologist for staging studies, biopsy, and definitive management.

80%

(164/206)

IV antibiotics for 6 weeks.

(4/206)

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SUBMIT RESPONSE 4 Review tested concept

(SAE07PE.32) What is the most common primary malignant bone or cartilage tumor in children? Tested Concept

QID: 6092

Type & Select Correct Answer

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Ewing’s sarcoma

14%

(51/356)

Giant cell tumor

(3/356)

Osteosarcoma

71%

(251/356)

Chondrosarcoma

(24/356)

Osteochondroma

(25/356)

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SUBMIT RESPONSE 3 Review tested concept

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