Summary of Results for 764 Patients
| Parameter | No. of patients | Percentage of patients | Follow-up |
| Suspected second primary malignancy | 49 | 6.4 | |
| PC atypical metastases | 8 | 1.0 | |
| Proven by biopsy | |||
| Lung | 2 | Lung metastases | |
| Lymph node | 2 | Atypical nodal metastases | |
| Proven by imaging or clinically | |||
| Lung | 2 | Lung metastases | |
| Lymph node | 2 | Nodal metastases | |
| Pathologically proven second primary malignancy | 5 | 0.7 | |
| Thyroid | 1 | Papillary thyroid carcinoma | |
| Lung | 2 | 1 adenocarcinoma and 1 SCC | |
| Tongue | 1 | SCC | |
| Lymphoma | 1 | DLBCL | |
| Proven benign | 24 | 3.1 | |
| Pathologically (thyroid) | 1 | Hurthle cell adenoma | |
| By endoscopy (larynx) | 1 | Normal larynx | |
| By imaging or clinically | |||
| Lung | 5 | 3 stable and 2 resolved | |
| Thyroid | 4 | Stable | |
| Liver | 3 | 2 hemangiomas and 1 resolved | |
| Lymph node | 3 | Stable | |
| Spleen | 2 | Stable | |
| Brain | 1 | Atypical meningioma | |
| Pancreas | 1 | Stable | |
| Bone | 1 | Resolved | |
| Soft tissue | 1 | Stable | |
| Skin | 1 | Stable | |
| Not yet confirmed | 12 | 1.6 |
SCC = squamous cell carcinoma; DLBCL = diffuse large B-cell lymphoma.