I think she said elbow tendinitis. Gripping the bars too tightly is what I'd suspect ... that might be a fit issue directly with bars the wrong width or bend, or it might be an indirect thing where she's hanging on for dear life because the bike feels squirrelly, or it might just be a bad habit.

snyderd, what's your preferred hand position? Do you change positions now and then during your rides (hoods, drops, tops if there's room)? Do you shake your arms and hands out periodically? Do you notice yourself (or did your fitter notice you) gripping too tightly? You said three fittings, but how many different handlebars did you try?