Primary Ewing sarcoma of the kidney presenting as haematuria in a pregnant woman - A case report highlighting the diagnostic and therapeutic dilemmas of the condition in pregnancy.

Primary Ewing sarcoma of the kidney is an extremely rare yet aggressive tumour. We present a 31-year-old pregnant female who presented to the emergency department with macroscopic haematuria and an ultrasound scan demonstrating a right renal mass. On magnetic resonance imaging, the lesion had features concerning for malignancy.

Aggressive Angiomyolipomas: the Clandestine Epithelioid Variant.

Epithelioid angiomyolipoma is a rare mesenchymal derived neoplasm of the kidney. Thought to be a variant of classical angiomyolipoma, a benign tumour, its malignant potential has been highlighted by case reports of loco-regional and distant metastasis. Given the potentially adverse clinical course associated with epithelioid angiomyolipoma compared to classical angiomyolipoma, the distinction and comprehensive histological characterisation of this rare entity is essential.

Clear cell papillary renal cell carcinoma: a potential mimic of conventional clear cell renal carcinoma on core biopsy.

Clear cell papillary renal cell carcinoma (CCP-RCC) is a recently described, relatively uncommon variant of renal cell carcinoma (RCC) with a reported incidence of 4.1%. Thought to only arise in those with end stage renal disease, CCP-RCC is increasingly identified in those without renal impairment.