The illegibility of doctors' handwriting has spawned innumerable jokes. Jottings that seem illegible and unintelligible may actually be technical terms that mimic commoner words. A cursory scan of Stedman's Medical Dictionary (1976) uncovered scores of seemingly-misspelled words. An abridged collection of these is given below, where each scientific term is followed by a brief definition, with its common look-alike in parentheses.
"Why Can't Doctors Spell?,"
Word Ways: Vol. 26
, Article 12.
Available at: http://digitalcommons.butler.edu/wordways/vol26/iss3/12