Localization of pancreatic polypeptide cells in a limited lobe of the human neonate pancreas: Remnant of the ventral primordium?

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Abstract
The localization of pancreatic polypeptide (PP) cells was studied in the pancreas of four human neonates by specific immunocytochemical techniques. PP cells were detected in all parts of the pancreas. However, examination at low magnification showed that they were considerably more numerous in a small lobe, located at the posterior-inferior part of the head region. It is suggested that this lobe corresponds to the part of the pancreas that is derived from the ventral primordium. Both in the lobe rich in PP cells and in the remainder of the pancreas, approximately 75% of PP cells were present in the islets and 25% distributed among acini and ducts.

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