Orbital metastasis in advanced gallbladder and biliary tract malignancy.

Orbital metastases are a rare site of spread for most malignancies. Here, we present an unusual case of an orbital mass as the first presenting sign of metastatic gallbladder and biliary tract cancer. MRI, positron emission tomography and tumour biopsy were used to establish the diagnosis. Treatment was started with chemoimmunotherapy, and radiation was deferred. Subsequent imaging showed tumour response to treatment.