High attenuation cyst on kidney, approximately 3cm. Erthryopoietin elevated and WBC, RBC and hemaocrit elevated though not drastically. Cancer?

Bright cyst on ct. Usually a high attenuating cyst means the cyst is bright on a CT scan. While malignancy is in the differential diagnosis there are benign causes as well, such as a hemorrhagic cyst (a cyst with blood in it). Usually such findings are followed up with additional imaging studies for better characterization and interval growth before proceeding to biopsy or resection. .