Table 2

Lesions identified on baseline scans in 2.3% of healthy subjects (14 of 601)

Lesion

Gender

Age in years

Outcome (investigation: final diagnosis/diagnoses)

Enchondroma

Female

54

Panel review: enchondroma

Enchondroma

Female

57

Panel review: enchondroma

Intramedullary lesion

Female

56

Panel review: benign enchondroma

Enchondroma

Female

61

X-ray, multi-slice computed tomography, panel review: lobulated enchondroma

Enchondroma

Male

72

X-ray, panel review: enchondroma

Marrow hyperplasia

Female

50

Physician review: haemoglobin 13.2 g/dL, blood donor, no additional reason for marrow hyperplasia

Marrow hyperplasia

Female

52

Haematological review: known anemia secondary to bleeding

Marrow hyperplasia

Female

54

Physician review: full blood examination stable over 2 years, no reason for marrow hyperplasia identified

Marrow hyperplasia

Female

60

Haematological review: anemia identified and treated

Ganglion

Male

73

Orthopedic surgeon and panel review: neuroma or soft tissue lesion identified. Ganglion likely. Differential diagnoses: haemangioma. Meniscal tear, chondromalacia patellae

Geode

Male

66

X-ray, MRI: medial meniscal tear, cartilage loss, medial femoral condyle and patellar cartilage, reactive marrow oedema, infra-patellar bursitis, osseous ganglion

Fibrous cortical defect

Female

52

X-ray, MRI: healed fibrous cortical defect

Baker cyst, atypical

Male

60

MRI: grade IV chondromalacia patella, medial meniscal tear, atypical Baker cyst (posteromedial joint line)

Ganglion

Female

63

Panel review: ganglion

MRI, magnetic resonance imaging.

Grainger et al. Arthritis Research & Therapy 2008 10:R18   doi:10.1186/ar2371