METGEMOGLOBINURIYA, dar tarkibi peshob vujud doshtani metgemoglobin. Peshob boyad ori az metgemoglobin boshad. Dar surati paydo shudani on peshob rangi surkhi ba khun monand megirad. M. bisyor vaqt hangomi gemolizi shadidi dokhiliragi, baze shaklhoi kamkhunii gemolizi, zahroludi az doruho (fenasetin, kodein) va moddahoi khimiyavi (anilin, nitrobenzol) ba nazar merasad. Peshomadi M. ba darajai vazninii bemorii asosi vobasta ast.