Abstract: A flag, or marker for identifying the locations of a plurality of tissue cassettes containing mounted Formalin Fixed Paraffin Embedded (FFPE) tissue specimens once removed from a tissue cassette/block storage system. The invention comprises a rectangular cuboid body member having front, rear, left, right, top, and bottom surfaces which substantially approximates the shape of a predefined number of tissue cassette/blocks, with a recessed area with grooves to accept one tissue index marker card for recording the patient's case information, or other relevant information. When multiples of the present invention are used within a tissue cassette/block storage system, they point to locations where pluralities of tissue cassette/blocks should be returned, and provides a support structure for neighboring tissue cassette/blocks within the storage location from becoming askew or damaged within the tissue cassette/block storage system.

Abstract: The present invention describes a flag, or marker for identifying the locations of a plurality of FFPE tissue blocks once removed from their storage locations within a tissue cassette/block storage system. The invention comprises a molded polymer rectangular cuboid body member with rectangular front, rear, top, left, right, and bottom surface, which follows the shape of a tissue cassette with an attached paraffin embedded medical tissue sample. The flag body member has a recessed groove to accept one tissue block index marker card for recording the patient's case information, or other relevant information, and offers hard surfaces for recording additional identification modalities, which additionally provides a support structure for the neighboring tissue blocks contained within said storage location.