Research Article
Incidence and Evaluation of Incidental Abnormal Bone Marrow Signal on Magnetic Resonance Imaging
Table 1
Cohort characteristics.
| | | All patients
, (%) | Evaluated
, (%) | Not evaluated
, (%) |
| | Age, median (range), and years | 58.5 (20–89) | 58.5 (24–83) | 59 (20–89) | | Male gender | 47 (43) | 8 (33) | 39 (45) | | Follow-up, median, and months | 41 (0–103) | 42.7 (0.3–96) | 39.6 (0–103) | | MRI location | | | | | Lumbar spine | 46 (42) | 12 (50) | 34 (40) | | Hip | 14 (13) | 2 (8) | 12 (14) | | Cervical spine | 10 (9) | 3 (13) | 7 (8) | | Knee | 8 (7) | 1 (4) | 7 (8) | | Reason for scan | | | | | Musculoskeletal complaint | 67 (61) | 13 (54) | 54 (63) | | Neurologic complaint | 26 (24) | 7 (29) | 19 (22) | | Infection | 4 (4) | 0 (0) | 4 (5) | | Prior abnormal imaging | 3 (3) | 1 (4) | 2 (2) | | Other | 9 (8) | 3 (13) | 6 (8) | | Ordering specialty | | | | | Internal medicine | 42 (38) | 8 (33) | 34 (40) | | Orthopedics | 13 (12) | 2 (8) | 11 (13) | | Neurology | 12 (11) | 3 (13) | 9 (10) | | Other | 43 (39) | 11 (46) | 32 (37) | | Smoking | | | | | Current smoker at scan | 20 (18) | 4 (17) | 16 (19) | | Former smoker at scan | 19 (17) | 4 (17) | 15 (17) | | Never smoker | 52 (47) | 15 (63) | 37 (43) | | Unknown | 19 (17) | 1 (4) | 18 (21) | | Hemoglobin within 3 months of scan | | | | | mgdL | 23 (21) | 6 (25) | 17 (20) | | mgdL | 46 (42) | 11 (46) | 35 (41) | | Unknown | 41 (37) | 7 (29) | 34 (39) |
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