Off the cuff and skin disease

I read yesterday about a controversial new book about Rav Soloveitchik - available here, and discussed here. The first book that this author, Rabbi David Holzer, published was based on his doctorate. The English title is Rabbi Elazar of Tarascon - Halachic Decisions and Responsum (sic - there are several responsa). His vaunted relationship with Rav Soloveitchik crops up in a footnote (p. 76, n. 67) about skin disease.