Calcification

Calcification is the accumulation of calcium salts in a body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,[1][2] causing it to harden. Calcifications may be classified on whether there is mineral balance or not, and the location of the calcification.[3] Calcification may also refer to the processes of normal mineral deposition in biological systems, such as the formation of stromatolites or mollusc shells (see Biomineralization).

This article is about the calcification of body tissue. For calcification of water pipes, see Hard water.
Density-Dependent Colour Scanning Electron Micrograph SEM (DDC-SEM) of cardiovascular calcification, showing in orange calcium phosphate spherical particles (denser material) and, in green, the extracellular matrix (less dense material).[1]

Signs and symptoms
Part of a series related to
Biomineralization
General
Exoskeletons (shells)
Endoskeletons (bones)
Teeth, scales, tusks etc
Calcification
Silicification
Other forms
Related
  •  Category

Calcification can manifest itself in many ways in the body depending on the location.

In the pulpal structure of a tooth, calcification often presents asymptomatically, and is diagnosed as an incidental finding during radiographic interpretation. Individual teeth with calcified pulp will typically respond negatively to vitality testing; teeth with calcified pulp often lack sensation of pain, pressure, and temperature.

Causes of soft tissue calcification

Calcification of soft tissue (arteries, cartilage, heart valves,[1][2] etc.) can be caused by vitamin K2 deficiency or by poor calcium absorption due to a high calcium/vitamin D ratio. This can occur with or without a mineral imbalance.

A common misconception is that calcification is caused by excess amount of calcium in diet. Dietary calcium intake is not associated with accumulation of calcium in soft tissue, and calcification occurs irrespective of the amount of calcium intake.[4]

Intake of excessive vitamin D can cause vitamin D poisoning and excessive intake of calcium from the intestine which, when accompanied by a deficiency of vitamin K (perhaps induced by an anticoagulant), can result in calcification of arteries and other soft tissue.[5] Such metastatic soft tissue calcification is mainly in tissues containing "calcium catchers" such as elastic fibres or mucopolysaccharides. These tissues especially include the lungs (pumice lung) and the aorta.[6]


Mineral balance

Forms

Calcification can be pathological or a standard part of the aging process. Nearly all adults show calcification of the pineal gland.[7]

Location

Breast disease
Main article: Microcalcification

In a number of breast pathologies, calcium is often deposited at sites of cell death or in association secretions or hyalinized stroma, resulting in pathologic calcification. For example, small, irregular, linear calcifications may be seen, via mammography, in a ductal carcinoma-in-situ to produce visible radio-opacities.[10]

Arteriosclerotic calcification

One of the principal causes of arterial stiffening with age is vascular calcification. Vascular calcification is the deposition of mineral in the form of calcium phosphate salts in the smooth muscle-rich medial layer of large arteries including the aorta. DNA damage, especially oxidative DNA damage, causes accelerated vascular calcification.[11] Vascular calcification could also be linked to the chronic leakage of blood lysates into the vessel wall since red blood cells have been shown to contain a high concentration of calcium.[12]

Diagnosis

In terms of diagnosis, in this case vascular calcification, an ultrasound and radiography of said area is sufficient.[13]

Treatment

Treatment of high calcium/vitamin D ratio may most easily be accomplished by intake of more vitamin D if vitamin K is normal. Intake of too much vitamin D would be evident by anorexia, loss of appetite, or soft tissue calcification.

See also

References
  1. Bertazzo, Sergio; Gentleman, Eileen; Cloyd, Kristy L.; Chester, Adrian H.; Yacoub, Magdi H.; Stevens, Molly M. (2013). "Nano-analytical electron microscopy reveals fundamental insights into human cardiovascular tissue calcification". Nature Materials. 12 (6): 576–583. Bibcode:2013NatMa..12..576B. doi:10.1038/nmat3627. ISSN 1476-1122. PMC 5833942. PMID 23603848.
  2. Miller, J. D. Cardiovascular calcification: Orbicular origins. Nature Materials 12, 476-478 (2013).
  3. Calcification The American Heritage Science Dictionary. Retrieved 2013-03-23.
  4. "Calcium beyond the bones". Harvard health Publishing. March 1, 2010.
  5. Paul Price, et al., "Warfarin-Induced Artery Calcification Is Accelerated by Growth and Vitamin D", Arteriosclerosis, Thrombosis, and Vascular Biology, 2000, Vol. 20, pp. 317-327.
  6. McGavin, Zachary. Pathologic basis of veterinary disease, fourth edition; Elsevier 2007.
  7. Zimmerman, Robert A (1982). "Age-Related Incidence of Pineal Calcification Detected by Computed Tomography" (PDF). Radiology. Radiological Society of North America. 142 (3): 659–62. doi:10.1148/radiology.142.3.7063680. PMID 7063680. Archived from the original (PDF) on 2012-03-24. Retrieved 21 June 2012.
  8. Muzio, Bruno Di. "Normal intracranial calcifications | Radiology Reference Article | Radiopaedia.org". Radiopaedia.
  9. calcification in ovarian tumours
  10. Robbins and Cotran (2009), Pathologic Basis of Disease, 8th edition, Elsevier.
  11. Duer, M.; Cobb, A. M.; Shanahan, C. M. (2020). "DNA Damage Response: A Molecular Lynchpin in the Pathobiology of Arteriosclerotic Calcification". Arteriosclerosis, Thrombosis, and Vascular Biology. 40 (7): e193–e202. doi:10.1161/ATVBAHA.120.313792. PMID 32404005. S2CID 218634735.
  12. Fu, Hualin; Li, Jilong; Du, Peng; Jin, Weilin; Gao, Guo; Cui, Daxiang (2022-11-30). "Senile plaques in Alzheimer's disease arise from Aβ- and Cathepsin D-enriched mixtures leaking out during intravascular haemolysis and microaneurysm rupture". FEBS Letters. 597 (7): 1007–1040. doi:10.1002/1873-3468.14549. ISSN 1873-3468. PMID 36448495. S2CID 254095098.
  13. Raggi, Paolo; Bellasi, Antonio (2007). "Clinical assessment of vascular calcification". Advances in Chronic Kidney Disease. 14 (1): 37–43. doi:10.1053/j.ackd.2006.10.006. ISSN 1548-5595. PMID 17200042.
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