My father has just had an abdominal CT done that showed a neoplasm with a diameter of about 3.5 cm (1.4 in) in the tail of the pancreas. The CT interpretation calls for further investigation and describes the mass as having undefined borders and the fat tissue around it as having elevated density (not sure about the terminology, this is my poor attempt to translate from German, since the test was done in Austria). He is 65, has no other relevant symptoms as far as we can tell, but we are all very scared it might be cancer. Can you please tell me how likely that is. Thank you.