cT1a lesion
Clinical stage T1a tumor confined to the kidney, typically small renal masses under 4cm discovered incidentally.
Full Definition
A clinical T1a (cT1a) lesion refers to a small renal tumor measuring 4 centimeters or less in greatest dimension that appears confined to the kidney on imaging studies. These lesions are often discovered incidentally during imaging for unrelated conditions and represent early-stage kidney cancer. The 'c' prefix indicates clinical staging based on imaging and physical examination, as opposed to pathological staging after surgical removal. Management options for cT1a lesions include active surveillance, partial nephrectomy, or ablative therapies, depending on patient factors and tumor characteristics.
Usage
Usage note: Always specify 'clinical' vs 'pathological' staging to avoid confusion in editorial contexts.
In Context
- "The patient's cT1a lesion was managed with thermal ablation given her advanced age and comorbidities." — Treatment planning note
- "Follow-up imaging confirmed the cT1a lesion remained stable over 18 months of active surveillance." — Surveillance report