The following other causes of similar manifestations must be considered: Salivary and lacrimal gland involvement: Sjögren syndrome, sarcoidosis, HIV, hepatitis C, lymphoma, salivary gland tumors Lung involvement: Sarcoidosis, granulomatosis with polyangiitis, idiopathic pulmonary fibrosis, malignancy, tuberculosis Pancreatic involvement: Acute or chronic pancreatitis, pancreatic cancer.