Cystic nephroma
A cystic nephroma, also known as multilocular cystic nephroma, mixed epithelial stromal tumour and renal epithelial stromal tumour , is a type of rare benign kidney tumour.
Symptoms
Cystic nephromas are often asymptomatic. They are typically discovered on medical imaging incidentally.Diagnosis
Cystic nephromas are diagnosed by biopsy or excision. It is important to correctly diagnose them as, radiologically, they may mimic the appearance of a renal [cell carcinoma] that is cystic.Pathologic diagnosis
Image:Cystic nephroma high mag.jpg|thumb|right|250px|High magnification micrograph of a cystic nephroma showing the characteristic simple epithelium with hobnail morphology, and the ovarian-like stroma. H&E stain.The characteristics of cystic nephromas are:
- Cysts lined by a simple epithelium with a hobnail morphology, i.e. the nuclei of the cyst lining epithelium bulges into the lumen of the cysts,
- Ovarian-like stroma that has a:
- *Spindle cell morphology, and has a
- *Basophilic cytoplasm.
Differential diagnosis
- cystic partially differentiated nephroblastoma
- cystic standard nephroblastoma
- cystic mesoblastic nephroma
- cystic renal cell carcinoma
- other renal cysts