Kidney Stone Octahedral Crystals
by Dennis Kunkel Microscopy/science Photo Library
Title
Kidney Stone Octahedral Crystals
Artist
Dennis Kunkel Microscopy/science Photo Library
Medium
Photograph - Photograph
Description
Kidney stone, coloured scanning electron micrograph (SEM). Kidney stones are primarily formed by crystallization of the mineral salt calcium oxalate from the urine. They are irregular shaped stones called calculi (calculus) and are composed of random oriented columnar monoclinic crystals of calcium oxalate monohydrate with peripheral deposits of fine octahedral crystals of calcium oxalate dehydrate (seen here). Patches of microcrystalline hydroxyl apatite fill internodal regions. Protein matrices can also be associated with the microcrystalline arrays. The hard stones can cause severe pain as they pass down the ureter (urinary tract). Kidney stones may need to be removed surgically using ultrasound. Magnification: x100 when shortest axis printed at 25 millimetres.
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September 13th, 2018
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