Table 4.
Characteristics of patients developing new lesions during surveillance
| Non-invasive(n = 29a) | Invasive (n = 3) | |
|---|---|---|
| Time to new lesion development, months, median (range) | 33 (7–145) | 60 (20–99) |
| FNA/biopsy/cytology, n (%) | 17 (59) | 3 (100) |
| Pathology, n (%) | ||
| Acellular/non-diagnostic | 5 (29) | 1 (33) |
| Cellular/Scant mucin | 5 (29) | 0 |
| Low-grade IPMN/mucin | 6 (35) | 1 (33) |
| High-grade atypia | 1 (6) | 1 (33) |
| Reoperations, n (%) | 8 (28) | 1 (33) |
| No intraductal papillary mucinous neoplasm | 3 | – |
| Low-grade | 3 | – |
| High-grade (CIS) | 2 | – |
| Invasive | – | 1 |
a
One patient developed an additional new intraductal papillary mucinous neoplasm following re-resection
CIS, carcinoma in situ