Sorry to post a nonmedical question, but I have Googled endlessly and can't find the answer. I'm editing a memoir about the life of a Viennese-American ophthalmologist who in the 1920s worked in the Vienna clinic of a supposedly famous Dr. Hyack, where Edward, the Prince of Wales, was said (in the memoir, twice) to have had a "Silesian cyst" removed. I finally changed it to "chalazion cyst," but now I see (from Googling again) that there is one lone result: the publisher William Jovanovich, in his 2003 memoir "The Temper of the West," says he had a "Silesian cyst." Hmmm. Dr. Hagan (or anyone else), ever heard of a "Silesian cyst"??