A: The FNA foam residue device, CytoFoam Core, consists of a core of absorbent foam housed in a Luer type plastic adapter.
B & C: A needle is attached to one end and, if a suction FNA technique is to be used, a syringe may be attached to the other end.
D: During the FNA procedure the assembly should be held by the needle hub, or should be connected to a syringe if a suction FNA technique is to be used.
E: The sample is absorbed into the tip of the foam core. Once the FNA sample has been collected the blue Luer type plastic housing should be separated from the needle.
F: The foam core must be protected by fitting the plastic guard cap (supplied) over the tip before formalin fixing for at least 6 hours — refer to user instructions for full requirements.
G: After formalin fixation the core is pulled from the adapter, wrapped in processing paper, paraffin processed and sectioned in the usual way.
H: An H&E stained section showing tumour cells within the CytoFoam Core.