Orbital metastasis as the primary manifestation of pancreatic carcinoma: a case report and literature review.

We report a rare case of metastatic orbital tumor from an unknown primary pancreatic carcinoma. Clinical characteristics of cases with metastatic pancreatic tumors seem to be different from those with metastatic tumors from the other lesions. Pancreatic tumors are frequently asymptomatic in an early stage, leading to delayed detection of the primary pancreatic carcinoma and poorer prognosis.