Oncocytoma: Cannot establish a definitive diagnosis and most require biopsy or surgery.
Primary lymphoma: Usually large retroperitoneal mass than engulfs the kidney.
Secondary lymphoma: Hematogenous metastases to the kidneys in patients with known prior treated lymphoma. Multiple bilateral homogenous hypodense and hypoenhancing lesions are characteristic.
Papillary renal cell carcinoma
Specific Subtypes of Renal cell carcinoma (RCC)
Clear cell: Most common subtype = 75% of renal cell carcinomas in most series
Papillary: Second most common subtype
Collecting duct 肾集合管癌
Imaging Findings for Specific Subtypes
Clear cell RCC 肾透明细胞癌:
Tend to have greater enhancement and more heterogeneity.
Termed clear cell by pathologists secondary to intracellular lipid and glycogen; the former can be detected by loss of signal intensity on opposed phase images when compared with corresponding in phase images.