[Problem] In a medical image display control device for displaying internal tissues of a subject, a method of operation for the same, and a medical image display control program, to produce a display of the internal tissue below a current display area, shown appropriately superimposed on the area, without the need to specify an excluded region of tissue outside the internal tissue. [Solution] The device is provided with: an area extraction unit (11) which extracts a plurality of areas from a three-dimensional image of a subject an internal tissue information acquisition unit (12) which, from among the plurality of areas, establishes an intersection area which is an area first intersected by a light beam used during projection of a three-dimensional image onto a two-dimensional projection surface, establishes a first intersection point which is a point on an area first intersected by a light beam when the intersection region has been excluded, establishes a second intersection point which is a point of intersection with the intersection area when retracing in the opposite direction from the direction of advance of the light beam from the first intersection point, and acquires internal tissue information included between the first intersection point and the second intersection point and a display controller (13) for displaying the internal tissue information, in superimposed form on the three-dimensional image.Le problème décrit par la présente invention est, au moyen dun dispositif de commande daffichage dimages médicales permettant dafficher des tissus internes dun sujet, de son procédé dexploitation et dun programme de commande daffichage dimages médicales, de produire un affichage du tissu interne au-dessous dune zone daffichage courante, présentée superposée de manière appropriée sur la zone, sans quil soit nécessaire de spécifier de région exclue de tissu à lextérieur du tissu interne. La solution selon linvention porte sur un dispositif doté : dune unité dextra
