A medical composition for protuberance of epithelium, which comprises a solution comprising a polysaccharide or a medically acceptable salt thereof, wherein the solution has a viscosity of: (1) from 50 to 500 mPas at a shear rate of from 7.7 to 10.0 s^-1; (2) from 45 to 300 mPas at a shear rate of from 19.2 to 20.0 s^-1; and (3) from 40 to 200 mPas at a shear rate of from 38.3 to 40.0 s^-1, when measured using a rotational viscometer at 25 C., and a syringe filled with the medical composition.