TABLE 3.
Multidetector computed tomography (MDCT)a imaging features of the 17 patients with mixed epithelial and stromal tumor of the kidney (MESTK)
| Case no. | Type | BC | MD (mm) | Shape | Location | SFI | Calcification | Septa | Mural nodule | Capsule | Enhancement pattern |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ST | NA | 75 | Re‐ | R‐1 | N | N | N | N | N | GE |
| 2 | ST | NA | 70 | Re‐ | L‐1 | N | Y | N | N | N | GE |
| 3 | ST | NA | 43 | Re‐ | R‐3 | Y | N | N | N | N | GE |
| 4 | CT | III | 112 | Irre‐ | R‐2 | Y | N | Re‐ | N | Y | GE |
| 5 | CT | III | 75 | Re‐ | L‐2 | Y | Y | Re‐ | N | Y | GE |
| 6 | ST | NA | 21 | Re‐ | R‐2 | N | N | N | N | N | GW |
| 7 | CT | IV | 109 | Irre‐ | L‐3 | Y | N | Irre‐ | Y | Y | GW |
| 8 | CT | IV | 39 | Re‐ | L‐3 | Y | N | Irre‐ | N | N | GE |
| 9 | ST | NA | 8 | Re‐ | L‐3 | N | N | N | N | N | GE |
| 10 | ST | NA | 27 | Re‐ | L‐3 | N | N | N | N | N | GE |
| 11 | CT | III | 64 | Re‐ | R‐3 | Y | N | Re‐ | N | Y | GE |
| 12 | CT | IV | 67 | Irre‐ | R‐3 | Y | Y | Irre‐ | Y | Y | GE |
| 13 | ST | NA | 29 | Re‐ | L‐3 | N | N | N | N | N | GE |
| 14 | ST | NA | 68 | Re‐ | R‐3 | Y | N | N | N | N | GE |
| 15 | CT | IV | 37 | Re‐ | L‐3 | Y | N | Irre‐ | N | Y | GE |
| 16 | ST | NA | 30 | Re‐ | R‐3 | Y | Y | N | N | N | GE |
| 17 | CT | II | 145 | Re‐ | L‐3 | N | N | Re‐ | N | Y | GE |
Note: L: left; R: right; 1: entirely above the upper or below the lower polar line; 2: lesion crosses polar line; 3: >50% of mass is across polar line or mass crosses the axial renal midline or mass is entirely between the polar lines. 13
Abbreviations: BC, Bosniak classification; CT, cystic type; GE, gradual enhancement; GW, gradual washout; Irre‐, irregular; MD, maximal diameter of tumor; NA, not applicable; Re‐, regular; SFI, sinus fat invagination; ST, solid type.
The scanning parameters: slice thickness of 1 mm, slice gap of 0 mm, the pitch of 1.2, 100 kVp and 200 mA for Somatom Definition and Aquilion ONE.