Bezoars are detectable as a mass lesion on most tests (eg, x-ray, ultrasound, ct) that may be done to evaluate upper GI symptoms.
They may be mistaken for tumors; upper endoscopy
is usually done. On endoscopy, bezoars have an unmistakable irregular surface and may range in color from yellow-green to gray-black. An endoscopic biopsy
that yields hair or plant material is diagnostic.