What is new enlargement of the pancreatic head with indistinctness of the pancreatic parenchyma?

Unclear: It sounds as though you may be reporting the results of an ultrasound or a CAT scan. With just this short description, it is impossible to tell you what this represents, but it is very important whenever a new finding may be present to have it evaluated appropriately. You should see your doctor or a gastroenterologist immediately. Do not ignore this, and do not delay. Good luck.