Renal mass. No fat. CT without contrast.

Is the mass homogeneous?

Homogeneous. TSTC(Too small to characterize).

Homogeneous. Larger than TSTC.

Heterogeneous.

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Notes:

Homogeneous mass: Thin or imperceptible wall, no mural nodule, septa or calcifications.

Heterogeneous mass: Thick or irregular wall, mural nodule, septa, calcifications or measurable/visible attenuation differences.