Inflammation — Acute & Chronic — Practice
A 55-year-old woman with a long history of joint pains and proteinuria has a rectal biopsy stained with Congo red, which shows extracellular deposits that appear apple-green under polarised light. The most likely precursor protein in this setting of chronic inflammation is:
ASerum amyloid-associated protein (AA)
BBeta-2 microglobulin
CImmunoglobulin light chains (AL)
DTransthyretin (ATTR)