mi·​cro·​cal·​ci·​fi·​ca·​tion -ˌkal-sə-fə-ˈkā-shən How to pronounce microcalcification (audio)
: a tiny abnormal deposit of calcium salts typically in the breast that is often benign but may be an indicator of breast cancer especially when appearing in compact clusters or a linear or branching pattern
A mammogram detects microcalcifications, which are tiny specks of calcium in the breast that may indicate cancer even before actual tumors form.Andrew Weil, Self Healing

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“Microcalcification.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/microcalcification. Accessed 3 Dec. 2023.

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