Benign renal tumours were histologically classified according to the World Health Organizatiοn 1. This is the subset of entities in the 2016 WHO classification of renal tumours that are associated with an International Classification of Diseases for Oncology (ICD-O) behaviour code of 0, indicating benign tumours. This article also separately includes entities with a behaviour code of 1, indicating unspecified, borderline, or uncertain behaviour. The remainder of entities in the WHO classification are considered malignant.
Benign tumours
Renal cell tumours
Metanephric tumours
Nephroblastic and cystic tumours occurring mainly in children
Mesenchymal tumours occurring mainly in children
Mesenchymal tumours occurring mainly in adults
- angiomyolipoma
- leiomyoma
- haemangioma
- lymphangioma
- juxtaglomerular cell tumour
- renomedullary interstitial cell tumour
- schwannoma
Mixed epithelial and stromal tumour family
Neuroendocrine tumours
Tumours of unspecified, borderline, or uncertain behaviour
Renal cell tumours
- multilocular cystic renal neoplasm of low malignant potential
- clear cell papillary renal cell carcinoma