Endoscopic Ultrasound-Guided Renal Parenchymal Biopsy: A Series of Two Cases

Abstract

Renal parenchymal biopsy is essential in the management of many kidney diseases. The percutaneous route is most commonly used for access. However, some conditions such as altered mental status, coagulopathy and critically ill patients preclude the procedure. Some anatomical variations such as high-sitting kidneys can also render them inaccessible to percutaneous biopsy. While trans-jugular renal biopsy is a costly alternative; requiring radiation and contrast exposure, endoscopic ultrasoundguided fine needle biopsy (EUS-FNB) is a cheaper and safer method that can circumvent the exceptional difficulties in tissue acquisition. We present two successful cases of EUS-FNB from renal parenchyma that proved to be instrumental in the diagnosis and management.