Table 2.
Percentage of parathyroid lesions identified but misclassified according to the location of the lesion and imaging technique.
| Surgical localization | Total number of adenomas among 99 patients | Ultrasound | [99mTc]pertechnetate/MIBI | [18F]FCH PET/CT | |||
|---|---|---|---|---|---|---|---|
| Identified (%) | Misclassified (%) | Identified (%) | Misclassified (%) | Identified (%) | Misclassified (%) | ||
| Upper left | 17 | 12/17 (70.6) | 5/12 (41.7) | 8/16 (50.0) | 3/8 (37.5) | 6/7 (85.7) | 2/6 (33.3) |
| Lower left | 32 | 26/32 (81.3) | 3/26 (11.5) | 19/30 (63.3) | 0/19 (0.0) | 5/6 (83.3) | 1/5 (20.0) |
| Lower right | 30 | 22/29 (75.9) | 2/22 (9.1) | 16/29 (55.2) | 1/16 (6.3) | 7/8 (87.5) | 1/7 (14.3) |
| Upper right | 24 | 17/24 (70.8) | 9/17 (52.9) | 12/21 (57.1) | 8/12 (66.7) | 8/8 (100.0) | 3/8 (37.5) |
| Upper | 41 | 29/41 (70.7) | 14/29 (48.3) | 20/37 (54.1) | 11/20 (55.0) | 14/15 (93.3) | 5/14 (35.7) |
| CI | 54.5–83.9 | 29.4–67.5 | 36.9–70.5 | 31.5–76.9 | 68.1–99.8 | 12.8–64.9 | |
| Lower | 62 | 48/61 (78.7) | 5/48 (10.4) | 35/59 (59.3) | 1/35 (2.9) | 12/14 (85.7) | 2/12 (16.7) |
| CI | 66.3–88.1 | 3.5–22.7 | 45.7–71.9 | 0.1–15.0 | 57.2–98.2 | 2.1–48.4 | |
| P upper vs lower | NS | 0.00029 | NS | 0.000014 | NS | 0.26 | |
| Total | 103 | 77/102 (75.5) | 19/77 (24.7) | 55/96 (57.3) | 12/55 (21.8) | 26/29 (89.7) | 7/26 (26.9) |
| CI | 66.0–83.5 | 15.6–35.8 | 46.8–67.3 | 11.8–35.0 | 72.6–97.8 | 11.6–47.8 | |
Misclassified = parathyroid lesions assigned to the correct side (right or left) but wrongly assigned to the upper/lower region.
No statistical differences were found in detection rates between the 4 locations.
CI 95% confidence interval.