Patent ID: 8778670

Claim:
A tissue cassette assembly for cell block embedding, comprising: a tissue cassette body including a first surface and a second surface, the tissue cassette body including a first opening through the first surface, a second opening through the second surface, and a flow passageway extending between the first opening and the second opening for passing cell sample and reagent through the tissue cassette body, wherein the tissue cassette body is constructed and arranged for mounting to a holder of a microtome; a filter for retaining aspects of the cell sample while allowing reagent to flow through the filter, the filter being removably connectable to the tissue cassette body so that the filter is positioned beneath and spaced beyond the second opening through the second surface, wherein when the filter is removably connected to the tissue cassette body, and cellular material and reagent including wax has been dispensed into the flow passageway and flowed across the filter, a plug of hardened wax and cellular material retained by the filter will protrude from the second opening when the filter is removed from the tissue cassette body.