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Kidney stone disease, also known as renal calculus disease, nephrolithiasis or urolithiasis, is a crystallopathy where a solid piece of material (renal calculus) develops in the urinary tract. [2] Renal calculi typically form in the kidney and leave the body in the urine stream. [2] A small calculus may pass without causing symptoms. [2]
Materials that inhibit the passage of electromagnetic radiation are called radiodense or radiopaque, while those that allow radiation to pass more freely are referred to as radiolucent. Radiopaque volumes of material have white appearance on radiographs, compared with the relatively darker appearance of radiolucent volumes. For example, on ...
A calculus (plural calculi) is a hard, stone-like concretion that forms within an organ or duct inside the body. They are usually made from mineral salts, and other types of calculi include tonsiloliths (tonsil stones) and renal calculi (kidney stones). Sialolithiasis refers to the formation of calculi within a salivary gland.
Treatments depend on the patient, the type of kidney stone and several other factors. These include: Surgical intervention. Some patients may need surgery to remove kidney stones or to help them pass.
Figure 18. Renal stone located at the pyeloureteric junction with accompanying hydronephrosis. [1] With US, larger stones (>5–7 mm) within the kidney, i.e., in the calyces, the pelvis and the pyeloureteric junction, can be differentiated, especially in the cases with accompanying hydronephrosis (Figure 18 and Figure 19).
Struvite kidney stones are also known as triple phosphate stones (calcium magnesium ammonium phosphate), owing to the presence of carbonate apatite that precipitates to accompany struvite at high pH. [ 10 ] [ 11 ] [ 12 ] Struvite and carbonate apatite precipitate in alkaline urine , forming kidney stones.
Saturation levels of uric acid in blood may result in one form of kidney stones when the urate crystallizes in the kidney. These uric acid stones are radiolucent, so do not appear on an abdominal plain X-ray. [57] Uric acid crystals can also promote the formation of calcium oxalate stones, acting as "seed crystals". [58]
"We are apprehensive of the elevated beta-adjusted exposure of the Mag 7 vs. the top 500 US equities excluding the Mag-7. Today, the aggregate exposure of the Mag 7 is 31.3%, or almost a third of ...