Grossly, the tumors are great slate gray to red-brown and vary from 2 mm to 10 cm. most are solid, although a few cystic tumors have been reported. In 249 collected cases, 61 percent of the patients had malignant tumors, and 44 percent of these had metastases, usually to the regional lymph nodes. The tumors are located with equal frequency in the head and tail of the pancreas.Medical Billing Training.will help you to do collections and also the pending amounts from the patients.