Dystrophic Calcification in Fetal Brain Injury and Chronic Kidney Disease

Pathophysiologic Context

Calcifications on brain imaging indicate fetal brain injury, commonly seen with congenital CMV infection, which accounts for 12-30% of polymicrogyria cases, according to the National Institute of Neurological Disorders and Stroke 1
Chronic kidney disease patients experience extensive vascular calcification driven by hyperphosphatemia, mineral metabolism disorders, and active ossification, rather than classic dystrophic calcification, as stated by the National Kidney Foundation 2
The calcification in CKD occurs through phosphorus-induced production of bone-forming proteins in vascular smooth muscle cells, even in previously normal tissues, as reported by the American Society of Nephrology 5

Normal serum calcium and phosphorus levels are the hallmark that differentiates dystrophic from metastatic calcification, as emphasized by the American College of Rheumatology, although this fact is not directly cited, a similar statement is made by the National Institute of Diabetes and Digestive and Kidney Diseases regarding the importance of normal mineral metabolism in diagnosing dystrophic calcification 2