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We investigate medium modi cations of the pentaquark -+ in dense medium, taking into account di erent parities of the exotic -+ baryon. We nd that the chemical potential of the -+ is shifted in a density-dependent way to one-loop order. We also investigated the effect of the scaled nucleon mass in dense medium on the-+ propagator. The results turn out to depend sensitively on the scaled nucleon mass and on the parity of the -+.