Presence of Macrotroponin for Over 2 Years in a Young Woman

We present the case of a 28-year-old woman who presented with nonspecific symptoms with a high-sensitivity troponin I level > 10,000 ng/L, which led to extensive investigations and a hospital stay. Follow-up testing using an alternate troponin assay yielded undetectable levels. Two years later, the patient had a high-sensitivity troponin I level > 1500 ng/L, with experiments confirming the presence of a macrocomplex. We advocate for …