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Spiral valves of Heister

1. Undulating folds or valves in the proximal mucosa of the cystic duct. (wikipedia.org) 2. A series of crescentic folds of mucous membrane in the upper part of the cystic duct, arranged in a somewhat spiral manner. (biology-online.org) Syn: plica spiralis ductus cystici, Amussat’s valve, Heister’s valve, spiral valve of cystic duct, spiral fold of cystic duct, valvula...

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