The Renal Sinus: An Imaging Review and Proposed Nomenclature for Sinus Cysts

Perirenal lymphatic systems: Evaluation using spectral presaturation with inversion recovery T2‐weighted MR images with 3D volume isotropic turbo spin‐echo acquisition at 3.0T

“…It has been reported that the small periplevic cysts develop from lymphatic ectasia secondary to blockage of the hilar lymphatics. 18 Fluid SI structures suggestive of the capsular, communicating capsular, and subfascial lymphatics could not be sufficiently visualized on SPIR T 2 WI with 3D-VISTA at 3.0T. Specifically, there was no grade 1 visualization (completely seen) for the subfascial lymphatics.…”

The Renal Sinus: Pathologic Spectrum and Multimodality Imaging Approach

“…Peripelvic cysts, parapelvic lymphatic cysts, parapelvic lymphangiectasia, and parapelvic cysts are a variety of terms that have been used to describe single or multiple cysts confined to the renal sinus (3,4).…”

“…There are two distinctly different patterns of cyst manifestation within the renal sinus (2)(3)(4). In the first pattern, multiple, small, confluent cysts appear to arise in the sinus itself.…”

“…The major branches of the renal artery and vein along with the major and minor calices of the collecting system are located within the renal sinus. The remainder of the sinus is filled with adipose tissue, lymphatic channels, nerve fibers of the autonomic nervous system, and varying quantities of fibrous tissue (1)(2)(3)(4). Therefore, various pathologic conditions can occur in the renal sinus from any of its constituents.…”

Treatment of Parapelvic Cyst by Internal Drainage Technology Using Ureteroscope and Holmium Laser

“…When the cyst occurs near the renal pelvis or pedicle, it is called a parapelvic cyst. A parapelvic cyst is a non-genetic cyst with pathological changes; the incidence is about 1%-2% of total renal cysts (2). The mechanism and tissue structure of parapelvic cyst is almost the same as the simple kidney cyst.…”