Gammaglutamyl transferase is elevated in a number of hepatobiliary conditions (nearly all forms of biliary disease and cholestasis will be associated with a raised GGT (1)). These include:
I got a small painless lump on my left cheek at my jaw joint. I asked my dentist who x-rayed it and he said It's a cyst and not to worry about it. Two months later I went to my primary care physician (PCP) who said it was probably a leak on my jaw joint and not to worry about it. I asked who would look at it if I wanted to have it biopsied. He told me to go to an ENT. I got an appointment about 2 months later thinking nothing major and she said it looked like either benign or cancerous parotid gland neoplasm. She was very surprised when the biopsy came back as follicular non-Hodgkin lymphoma. I eventually had chemotherapy and now am in remission. I later got a biopsy of a basal cell carcinoma and asked for the biopsy report from a previous lesion two years ago on my wrist. It was prurigo nodularis that can be an indicator of an internal malignancy. Who knew! My oncologist said if I had been diagnosed at the dental or PCP visit then it's likely we could have had a cure with radiation, but the lymph nodes were enlarged also near my lower neck ruling out radiation treatment.