Table 1.

Histological classification of ectopic pancreas

Classification	Heinrich’s classification	Fuentes’s classification
I	All components of normal pancreatic tissue, including acini, ducts, and pancreatic islet cells	All components of normal pancreatic tissue, including acini, ducts, and pancreatic islet cells
II	Composed of acini and ducts, without pancreatic islet cells	Composed of ducts
III	Composed of ducts	Composed of acini (exocrine)
IV		Composed of pancreatic islet cells (endocrine)