Apparatus for testing the integrity of a mammary tissue comprising: - a housing comprising a cup-shaped recess configured to support the mammary tissue to be analyzed; - a fixed supporting structure and a movable frame structure mounted thereon; the movable frame structure comprising a substantially horizontal platform; - one or more transmission antennas mounted to the platform and operating in the band of microwaves configured to strike said mammary tissue with a main electromagnetic field; - one or more reception antennas operating in the same band and configured to pick up a corresponding reflected electromagnetic field; - a processing unit comprising: • a first operating module configured to determine, as a function of said reflected electromagnetic field, a main parameter representing an electrical discontinuity of said mammary tissue; • a second operating module configured to generate, as a function of said main parameter, a signal representing a non-integrity of said mammary tissue; wherein said one or more transmission antennas are mounted on first supports projecting from the platform; the apparatus further comprising: - an hub passing through the horizontal platform and a motor coupled to the hub, - at least one arm comprising a support projecting from the arm, with the one or more reception antennas being mounted on said support, wherein the arm is adapted to rotate around the hub to bring about a rotation of the one or more reception antennas; wherein said one or more transmission antennas are arranged in a more radially external position than said one or more reception antennas, with respect to said mammary tissue, wherein the one or more reception antennas are configured to be rotatably moved, in such a way as to pick up said reflected electromagnetic field in different directions; - a coaxial rotary joint for electrically connecting the one or more rotating reception antennas to the processing unit; - and a motor for positioning of the horizontal platform at a predefined height such that said one or more transmission antennas and said one or more reception antennas can be repeatedly positioned at different heights along the height of said mammary tissue. - a housing comprising a cup-shaped recess configured to support the mammary tissue to be analyzed; - a fixed supporting structure and a movable frame structure mounted thereon; the movable frame structure comprising a substantially horizontal platform; - one or more transmission antennas mounted to the platform and operating in the band of microwaves configured to strike said mammary tissue with a main electromagnetic field; - one or more reception antennas operating in the same band and configured to pick up a corresponding reflected electromagnetic field; - a processing unit comprising: • a first operating module configured to determine, as a function of said reflected electromagnetic field, a main parameter representing an electrical discontinuity of said mammary tissue; • a second operating module configured to generate, as a function of said main parameter, a signal representing a non-integrity of said mammary tissue; wherein said one or more transmission antennas are mounted on first supports projecting from the platform; • a first operating module configured to determine, as a function of said reflected electromagnetic field, a main parameter representing an electrical discontinuity of said mammary tissue; • a second operating module configured to generate, as a function of said main parameter, a signal representing a non-integrity of said mammary tissue; wherein said one or more transmission antennas are mounted on first supports projecting from the platform; - an hub passing through the horizontal platform and a motor coupled to the hub, - at least one arm comprising a support projecting from the arm, with the one or more reception antennas being mounted on said support, wherein the arm is adapted to rotate around the hub to bring about a rotation of the one or more reception antennas; wherein said one or more transmission antennas are arranged in a more radially external position than said one or more reception antennas, with respect to said mammary tissue, wherein the one or more reception antennas are configured to be rotatably moved, in such a way as to pick up said reflected electromagnetic field in different directions; - a coaxial rotary joint for electrically connecting the one or more rotating reception antennas to the processing unit; - and a motor for positioning of the horizontal platform at a predefined height such that said one or more transmission antennas and said one or more reception antennas can be repeatedly positioned at different heights along the height of said mammary tissue.