Indianapolis, Indiana 46202


Kidney stones are very common. They affect 3-5% of the population in the United States. Many people are hospitalized for the treatment of kidney stones and some may die. Better understanding of what causes kidney stones is useful in both the treatment and prevention of kidney stones. However, exactly what causes kidney stones is unknown. The most common type of kidney stones contains calcium, which sometimes is attached to a part of the kidney important in producing the final urine, called the papilla. The investigators have noticed that persons who form kidney stones seem to have more papilla with stones attached. They propose to study these areas of the papilla, called Randall's plaques (named after their discoverer), in patients undergoing surgery for kidney stones.

Study summary:

In order to attempt to explain the pathogenesis of renal calculi, the investigators videotape and document the location and characteristics of each stone, papillae and calyces. One or more small papillary biopsies are taken for analysis to help determine the point of origin of the kidney stone and histological studies are undertaken to determine tissue differences amongst different types of stone formers. Approximately one month after surgery, metabolic studies are undertaken to further review potential causes of stone formation.


Inclusion Criteria: - Patients of Methodist Urology in Indianapolis, IN who are undergoing endoscopic procedures for nephrolithiasis or other urologic disease. - Upper urinary tract endoscopic or PERC procedure for kidney stones removal - General medical health allowing surgical procedure - Ability to complete all the necessary components of the study - Able to sign an informed consent Exclusion Criteria: - Poor general medical health - Bleeding diathesis - Inability or unwillingness to comply with post-surgical follow-up



Primary Contact:

Principal Investigator
James Lingeman, MD
IU Health Physicians Urology

Kim Smoot
Phone: 317-962-0869

Backup Contact:


Location Contact:

Indianapolis, Indiana 46202
United States

Kim Smoot
Phone: 317-962-0869

Site Status: Recruiting

Data Source:

Date Processed: November 18, 2019

Modifications to this listing: Only selected fields are shown, please use the link below to view all information about this clinical trial.

Click to view Full Listing

If you would like to be contacted by the clinical trial representative please fill out the form below.