case_images: PMC8046481_01
case_images: Pelvic radiography at presentation, showed an osseous mass related to the right femur neck.
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case_images: F1
case_images: The patient visited a general orthopedic surgeon 1 month before the presentation which ordered a pelvic radiography that showed an osseous mass related to the right femur neck (Fig. 1).
case_images: Computed tomography scan axial view showed a right posterior-inferior osseous mass with cortical and medullary continuity with the femur neck.
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case_images: F2
case_images: Computed tomography scan (CT scan) was ordered and showed a right femoral neck posterior-inferior osseous mass with cortical and medullary continuity on the axial view (Fig. 2).
case_images: Magnetic resonance image - sagittal short tau inversion recovery fast spin-echo (SAG STIR fast IR) showed the posterior relation of the osteochondroma to the femur neck (arrow), and the high intensity cap thickness which goes with the diagnosis of osteochondroma.
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case_images: F3
case_images: MRI - sagittal short tau inversion recovery fast spin-echo (SAG STIR fast IR) showed the posterior relation of the OC to the femur neck, and the high intensity cap which goes with the diagnosis of OC (Fig. 3).
case_images: Magnetic resonance image sagittal view T1 in (A) and T2 in (B), showing the posterior relationship of the osteochondroma to the femur neck.
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case_images: F4
case_images: MRI - sagittal view T1 in (a) and T2 in (b), showing the posterior relationship of the OC to the right femur neck (Fig. 4).
case_images: Magnetic resonance image - axial views - showing the cartilage cape low enhancement in T1 (a) and high enhancement in T2 (b).
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case_images: F5
case_images: MRI - axial views show the cartilage cape low enhancement in T1(a) and high enhancement in T2(b) (Fig. 5).
case_images: The osseous mass gross appearance after resection, showing the cartilage coverage, it measures around 6 cm.
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case_images: F6
case_images: It was completely removed without a fracture to the femur neck (Fig. 6, 7).
case_images: The osseous mass gross appearance after resection, showing its (stalk) which was attached on and in continuation with the femur neck cortex.
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case_images: F7
case_images: It was completely removed without a fracture to the femur neck (Fig. 6, 7).
case_images: Post-operative X-ray AP view of the pelvis showing right hip two fully threaded cannulated screws with complete resection of the osteochondroma without fracture.
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case_images: F8
case_images: Then, we fixed the femur neck with two fully threaded cannulated screws as a prophylactic fixation (Fig. 8, 9).
case_images: Post-operative X-ray lateral view of the right hip showing two fully threaded cannulated screws with complete resection of the osteochondroma without fracture.
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case_images: F9
case_images: Then, we fixed the femur neck with two fully threaded cannulated screws as a prophylactic fixation (Fig. 8, 9).
case_images: Sections from the lesion demonstrate a cartilaginous cap with underlying bone (a and b) exhibiting areas of endochondral ossification with growth plate-like areas (c and d). The chondrocytes are bland looking, with no morphologic evidence of increased cellularity, pleomorphism, enlargement, or mitosis (e).
case_images: JOCR-11-91-g010.jpg
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case_images: F10
case_images: The mass was sent for histopathology evaluation (Fig. 10), which confirms the diagnosis of OC.