Source:http://linkedlifedata.com/resource/umls/id/C0042018
MSH: Low-density crystals or stones in any part of the URINARY TRACT. Their chemical compositions often include CALCIUM OXALATE, magnesium ammonium phosphate (struvite), CYSTINE, or URIC ACID.,CSP: abnormal concretions occuring within the urinary tract, usually composed of mineral salts.