Crossword clue: an erythematous affection of the skin, with severe constitutional and nervous symptoms, endemic in northern italy.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a disease caused by deficiency of niacin or tryptophan (or by a defect in the metabolic conversion of tryptophan to niac