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Hemangioma
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- Usually occurs in adults, women = men
- Clinical features: Typically asymptomatic, but may be associated with recurrent hematuria and/ or anemia.
- Associations:
- Klippel-Trenauny syndrome
- Sturge-Weber Syndrome
- Gross pathology: generally solitary, although 10% may be bilateral; spongy red appearance; may affect any part of the kidney, but most often arise in the medulla and renal papillae.
- Histologic features:
- composed of vascular spaces of varying sizes.
- often has irregular borders
- no nuclear atypia or mitotic figures.
- Behavior: benign.
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