nyrepelvis

Nyrepelvis is an informal or regionally encountered term used to describe the renal pelvis, the funnel-shaped reservoir at the upper collecting area of the kidney. The word combines nyre, a Scandinavian root meaning kidney, with pelvis, the Latin-derived term for a basin. Functionally, the nyrepelvis collects urine produced by the renal papillae and calyces and directs it into the ureter through the hilum of the kidney. Its exact size and contour vary with age, body size, and congenital factors, but it typically forms part of the central collecting system within the renal sinus. The nyrepelvis can be affected by conditions that obstruct urine flow, such as ureteropelvic junction stenosis, stones, or external compression, potentially leading to hydronephrosis if not relieved. Diagnostic imaging—ultrasound, CT urography, or MR urography—renders the nyrepelvis as the central dilated basin, and radiologists assess its patency, shape, and relation to calyces and the ureter. In standard anatomy curricula, the term nyrepelvis is less common than renal pelvis, and many sources use the latter exclusively; when nyrepelvis appears, it is usually stated to be synonymous with the renal pelvis. See also: Renal pelvis; Ureter; Kidney.