label: Fetal neck mass
label_lc: fetal neck mass
description: "An abnormal growth (lump) of tissue in the neck region of a fetus. Masses may be simple cystic,, cystic with a few simple septations (fewer than three septations and less than 3-mm thick), cystic with multiple or thick septations (greater than three septations or septations 3-mm-thick or more), a mass that is than is less than 50% solid, and a mass that is 50% solid or more."