| Clinical Diagnosis | No. Patients (n = 146) | No. of patients with positive PCR (n = 28) |
| Epithelial | 58 | 20 |
| Stromal and Epithelial | 26 | 8 |
| Stromal | 8 | 0 |
| Old HSK | 17 | 0 |
| Healthy/Other | 37 | 0 |