Table II.
Details of previous operations and procedures
| Operation
|
|||
|---|---|---|---|
| First | Second | Third | |
| Number of operations | 163* | 41 | 5 |
| Procedure | |||
| Neck exploration | 157 | 34 | 3 |
| Four glands | 146 | 19 | 1 |
| Directed | 11 | 15 | 2 |
| Mediastinal approach | 1 | 2 | 3 |
| Median sternotomy | 1 | 1 | 1 |
| Thoracoscopy | 0 | 1 | 0 |
| Details not recorded | 0 | 0 | 2 |
| Unknown | 6 | 5 | 0 |
| Parathyroid biopsied/resected | |||
| No parathyroid tissue removed | 28 | 24 | 5 |
| One gland | 52 | 7 | 0 |
| Two glands | 38 | 8 | 0 |
| Three glands | 25 | 0 | 0 |
| Four glands | 8 | 0 | 0 |
| Unknown | 12 | 2 | 0 |
| Result | |||
| Persistent | 150 | 41 | 5 |
| Recurrent | 13 | 0 | 0 |
| Mean time to recurrence (yrs) (± SEM) | 6.2 (1.4) | ||
| Range of time to recurrence (yrs) | 1–16 | ||
| Additional procedures | |||
| Thyroid procedure | 49 | 18 | 2 |
| Lobectomy or portion of lobe | 39 | 17 | 2 |
| Total or subtotal | 10 | 1 | 0 |
| Transcervical thymectomy | 31 | 7 | 1 |
| Immediate autograft | 2 | 0 | 0 |
| Removal of autograft | 0 | 0 | 0 |
| Mediastinal lesion ablation attempt | 8 | ||
*
One patient had both a neck and mediastinal exploration at first operation.