A highly differentiated exocrine pancreatic tumour in a young boy.

A primary pancreatic tumour in a 6-year-old boy was removed by radical excision. From both light and electron microscopic observations the tumour was considered to be of exocrine origin, with some differentiation towards acinar cells. Although the tumour was highly differentiated, it was regarded as probably malignant because of tumour growth into the surrounding fibrous capsule. The case is discussed in relation to earlier rare reports of pancreatic tumours in infants and children.