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Adjacent soft tissue abscess and sinus tract formation extending from the olecranon to the skin surface, consistent with chronic osteomyelitis. | |
Diffuse marrow edema in the proximal femur with cortical disruption and soft tissue abscess, consistent with acute osteomyelitis. | |
Edema and enhancement in the radial head, with evidence of cortical erosions and intramedullary necrosis. | |
Marrow signal alteration in the clavicle with cortical erosion and surrounding soft tissue edema. | |
Intraosseous abscess in the proximal ulna with surrounding marrow edema and cortical breach. | |
Marrow signal alteration in the clavicle with cortical erosion and surrounding soft tissue edema. | |
Chronic osteomyelitis with thickened periosteum and sclerosis in the proximal humeral metaphysis. | |
Adjacent soft tissue abscess and sinus tract formation extending from the olecranon to the skin surface, consistent with chronic osteomyelitis. | |
Periosteal reaction along the tarsal bones with diffuse marrow edema, indicative of spreading osteomyelitis. | |
Isolated Brodie’s abscess in the proximal femur with a well-defined rim and central necrosis. | |
Fredericson MRI classification of medial tibial stress syndrome | |
Grade III Fredericson MRI classification of medial tibial stress syndrome | |
Clear cell sarcoma in the distal humerus with high T2 signal, infiltrative borders, and extension into the adjacent muscle compartments. | |
Ewing sarcoma in the radial shaft with ill-defined margins, cortical destruction, and surrounding periosteal reaction. | |
Desmoid tumor in the supraspinatus fossa with well-defined margins, low T1 signal, and high T2 signal without central necrosis. | |
Synovial sarcoma in the plantar aspect of the foot with multi-lobulated appearance, heterogeneous T2 signal, and prominent perilesional edema. | |
Synovial sarcoma in the axillary region with heterogeneous signal and septal enhancement, showing invasion into the surrounding musculature. | |
Ewing sarcoma involving the calcaneus with permeative lytic destruction, cortical erosion, and a surrounding soft tissue mass. | |
Epithelioid hemangioendothelioma in the proximal humerus with small lytic lesions and mild soft tissue extension. | |
Parosteal osteosarcoma involving the posterior femur with broad-based attachment to the cortex and minimal medullary involvement. | |
Myxoid liposarcoma in the posterior knee compartment with high T2 signal and septal enhancement, extending into the popliteal fat. | |
Large soft tissue mass in the deltoid region with heterogeneous enhancement and internal necrotic areas, suggestive of pleomorphic sarcoma. | |
Ewing sarcoma involving the calcaneus with permeative lytic destruction, cortical erosion, and a surrounding soft tissue mass. | |
Parosteal osteosarcoma involving the posterior femur with broad-based attachment to the cortex and minimal medullary involvement. | |
Myxoid liposarcoma in the posterior knee compartment with high T2 signal and septal enhancement, extending into the popliteal fat. | |
Osteosarcoma of the proximal humerus with extension into the surrounding soft tissues and a classic sunburst periosteal pattern. | |
Alveolar soft part sarcoma in the midfoot, presenting as a well-defined mass with high T2 signal intensity and internal necrosis. | |
Chondrosarcoma of the tarsal bones with endosteal scalloping and ring-and-arc calcifications, with mild cortical expansion. | |
Large high-grade osteosarcoma in the proximal femur with cortical disruption, intramedullary extension, and a ‘Codman triangle’ periosteal reaction. | |
Synovial sarcoma in the plantar aspect of the foot with multi-lobulated appearance, heterogeneous T2 signal, and prominent perilesional edema. | |
Dedifferentiated liposarcoma in the iliopsoas compartment with mixed signal intensity and necrotic regions. | |
Epithelioid hemangioendothelioma in the proximal humerus with small lytic lesions and mild soft tissue extension. | |
Clear cell chondrosarcoma in the femoral neck with lobulated margins and hyperintense T2 signal in the medullary cavity. | |
Post-SBRT changes in the L3 vertebral body with marrow edema, sclerosis, and mild enhancement without evidence of residual metastatic disease. | |
Lytic lesion in the T9 vertebral body with high T2 signal and peripheral enhancement, consistent with metastatic progression post-SBRT. | |
Increased enhancement in a previously treated occipital metastasis with surrounding edema, suggestive of possible tumor recurrence. | |
Stable sclerotic changes in the left adrenal with no residual soft tissue component, consistent with post-radiation effect. | |
Post-SBRT changes in the L3 vertebral body with marrow edema, sclerosis, and mild enhancement without evidence of residual metastatic disease. | |
Stable treated lesion in the L5 vertebral body showing sclerotic transformation with no evidence of soft tissue extension, indicating successful local control. | |
Newly identified T1 hypointense lesion in the C7 vertebra with high T2 signal and peripheral enhancement, concerning for new metastatic focus despite SBRT. | |
Increased T2 signal and peripheral enhancement in a treated lesion in segment II, suggesting progression or residual viable tumor. | |
Post-SBRT changes in the right middle lobe with peripheral ground-glass opacities, fibrosis, and mild pleural thickening. | |
New subcentimeter nodule in the right upper lobe with spiculated margins and mild enhancement, suggestive of possible new metastatic disease. | |
Treated lesion in the left lower lobe with dense fibrosis, volume retraction, and absence of contrast enhancement, indicating complete response. | |
Increased enhancement in a previously treated occipital metastasis with surrounding edema, suggestive of possible tumor recurrence. | |
Persistent marrow edema in the right iliac crest with no enhancement, likely representing post-SBRT inflammatory changes. | |
Post-SBRT changes in the right middle lobe with peripheral ground-glass opacities, fibrosis, and mild pleural thickening. | |
Increased enhancement in a previously treated right adrenal mass, with new peripheral irregularities suggestive of possible recurrence. | |
New hypervascular lesion in segment IVa, suspicious for oligoprogressive hepatic metastasis despite prior SBRT treatment in adjacent segments. | |
Residual mass in the left upper lobe with central cavitation and rim enhancement, concerning for viable tumor post-SBRT. | |
Oligoprogressive metastatic focus in the right acetabulum with increased enhancement and surrounding soft tissue edema post-SBRT. | |
Persistent marrow edema in the right iliac crest with no enhancement, likely representing post-SBRT inflammatory changes. | |
Post-SBRT treated lesion in the left frontal lobe with central necrosis, surrounding gliosis, and decreased enhancement indicating treatment response. | |
Post-SBRT treated lesion in the left frontal lobe with central necrosis, surrounding gliosis, and decreased enhancement indicating treatment response. | |
Stable post-SBRT lesion in segment VI with surrounding biliary dilatation and mild intrahepatic edema consistent with radiation effect. | |
Diffuse hypointensity on T1 and hyperintensity on T2 in the perilesional region of the left temporal lobe, likely post-radiation effect. | |
Newly identified lesion in the left pubic ramus with high T2 signal and mild contrast enhancement, concerning for metastatic oligoprogression. | |
SBRT-treated lesion in segment VIII with peripheral fibrosis, mild retraction, and decreased vascularity, consistent with post-radiation changes. | |
Increased T2 signal and peripheral enhancement in a treated lesion in segment II, suggesting progression or residual viable tumor. | |
Residual mass in the left upper lobe with central cavitation and rim enhancement, concerning for viable tumor post-SBRT. | |
Post-treatment changes in the sacral region with signal alteration in the bone marrow and mild soft tissue edema consistent with radiation effect. | |
New hyperintense nodule on T2-weighted images in the right adrenal gland, concerning for oligometastasis not previously targeted by SBRT. | |
Increased enhancement in a previously treated right adrenal mass, with new peripheral irregularities suggestive of possible recurrence. | |
New 1 cm enhancing nodule in the right adrenal gland, concerning for oligoprogressive metastasis despite prior SBRT. | |
New enhancing lesion in the right parietal lobe with irregular borders and vasogenic edema, concerning for oligoprogressive metastasis. | |
Post-SBRT fibrosis in the left upper lobe with volume loss and traction bronchiectasis without evidence of residual or recurrent disease. |
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