Summary of 26 primary malignant lesions
| Histopathology of Primary Lesion | No. of Lesions | Primary Site (No. of Sites) |
|---|---|---|
| Adenocarcinoma | 13 | |
| Well differentiated | 6 | Lung (4), ovary (1), uterus (1) |
| Moderately differentiated | 1 | Lung (1) |
| Poorly differentiated | 6 | Lung (6) |
| Small-cell carcinoma | 3 | Lung (3) |
| Large-cell carcinoma | 2 | Lung (2) |
| Squamous cell carcinoma | 2 | Esophagus (2) |
| Papillotubular carcinoma | 2 | Breast (2) |
| LCNC | 1 | Lung (1) |
| Mucoepidermoid carcinoma | 1 | Lung (1) |
| Sarcoma | 1 | Synovium (1) |
| Malignant melanoma | 1 | Skin (1) |
Note:—LCNC indicates large-cell neuroendocrine carcinoma.