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Plica spiralis ductus cystici

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plica spiralis ductus cystici --> spiral fold of cystic duct

A series of crescentic folds of mucous membrane in the upper part of the cystic duct, arranged in a somewhat spiral manner.

Synonym: plica spiralis ductus cystici, amussat's valve, heister's valve, spiral valve of cystic duct, valvula spiralis.