Mönckeberg sclerosis revisited: a clarification of the histologic definition of Mönckeberg sclerosis.

Archives of Pathology & Laboratory Medicine
Robert G MichelettiMichael C Fishbein

Abstract

Medial calcification of muscular arteries is known as Mönckeberg sclerosis (MS). Although this was first described in 1903, disagreement persists over its precise histologic appearance. Some, including Mönckeberg, have written that the media alone are calcified, whereas others maintain that both the media and internal elastic lamina (IEL) are involved. Since vascular calcification is of great interest to investigators and clinicians, defined criteria for classifying calcified arterial lesions are important. To clarify the histologic definition of MS with regard to calcification of the IEL. We reviewed slides from 14 incisional and excisional surgical biopsies and autopsy specimens containing arteries with previously diagnosed MS. We looked specifically for medial and IEL calcification and used von Kossa, alizarin red, and trichrome/elastic stains to confirm our findings. We also performed a literature search on the histologic appearance of MS. Both medial and IEL calcification were present in all specimens. Medial calcification extended alongside calcified IEL. In focal regions, calcification appeared limited to the IEL, with minimal medial calcification. Occasionally, calcified nodules in the media appeared separated from the ...Continue Reading

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