The School of Athens
According to Zamboni, the varicose veins on the legs and knees are evident in Michelangelo, in the role of Heraclitus, frescoed by Raphael in The School of Athens. The evident anemia, brown skin, and acanthosis nigricans of Young Sick Bacchus of Caravaggio exhibited at the Galleria Borghese in Rome, according to Zamboni suggest the diagnosis of Addison's disease, a condition described in the 1800s affecting the adrenal glands.