Indication for transplantation according to PET and CT status before transplantation
| Subtype . | PET-negative (n = 38) . | PET-positive (n = 42) . | ||
|---|---|---|---|---|
| CT-positive (n = 17) . | CT-negative (n = 21) . | CT-positive (n = 34) . | CT-negative (n = 8) . | |
| Follicular lymphoma* | 8 | 6 | 12 | 4 |
| Hodgkin lymphoma | 4 | 4 | 11 | 3 |
| Mantle cell lymphoma | 1 | 4 | 6 | 0 |
| Diffuse large B-cell lymphoma | 2 | 4 | 1 | 0 |
| Transformed follicular | 1 | 2 | 2 | 1 |
| Peripheral T-cell lymphoma | 1 | 1 | 2 | 0 |
| Subtype . | PET-negative (n = 38) . | PET-positive (n = 42) . | ||
|---|---|---|---|---|
| CT-positive (n = 17) . | CT-negative (n = 21) . | CT-positive (n = 34) . | CT-negative (n = 8) . | |
| Follicular lymphoma* | 8 | 6 | 12 | 4 |
| Hodgkin lymphoma | 4 | 4 | 11 | 3 |
| Mantle cell lymphoma | 1 | 4 | 6 | 0 |
| Diffuse large B-cell lymphoma | 2 | 4 | 1 | 0 |
| Transformed follicular | 1 | 2 | 2 | 1 |
| Peripheral T-cell lymphoma | 1 | 1 | 2 | 0 |
PET indicates positron emission tomography; and CT, computed tomography.
Fourteen patients with follicular lymphoma were PET-negative before transplantation. Of these, 3 had evidence of FDG-avid disease at some stage before transplantation (but were rendered PET-negative immediately before transplantation by salvage chemotherapy). A further 3 patients relapsed with FDG-avid disease after transplantation. It is therefore possible that up to 8 patients with FL did not have FDG-avid disease.