Aseptic lymphocyte-dominant vasculitis-associated lesion (ALVAL)
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At the time the article was created Magdalena Chmiel-Nowak had no recorded disclosures.View Magdalena Chmiel-Nowak's current disclosures
At the time the article was last revised Daniel J Bell had no recorded disclosures.View Daniel J Bell's current disclosures
Aseptic lymphocyte-dominant vasculitis-associated lesion (ALVAL) is a histological entity denoting a chronic inflammatory response to metal particles (cobalt and chromium ions) from a metal-on-metal prosthesis. The finding falls on the spectrum of adverse reactions to metal debris.
It is thought to be a T-lymphocyte-mediated type IV hypersensitivity reaction. The particles activate cytotoxic T-lymphocytes and macrophages, which in turn leads to tissue damage.
Although it is thought to be proportional to the amount of debris, ALVAL is also observed in cases of small debris amount.