An abnormal passageway between two structures is called a(n):

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A fistula is a pathological passage that forms between two structures that are not normally connected, such as between two organs, vessels, or anatomical spaces. Atresia refers to a congenital absence or closure of a normal body orifice or tubular structure, while biopsy is a procedure to remove tissue for diagnostic purposes. Syndrome refers to a group of symptoms that occur together and collectively characterize a particular disease or disorder.

An Abnormal Passageway Between Two Structures Is Called A(n)