Spot the correct tissue every time in multi-tissue blocks
2015
Coffey, Anna | Johnson, Michael D. | Berry, Deborah L.
Multi-tissue paraffin blocks provide high throughput analysis with increased efficiency, experimental uniformity, and reduced time and cost. Tissue microarrays make up the majority of multi-tissue paraffin blocks, but increasingly, researchers are using non-arrayed blocks containing larger tissues from multiple individuals which can provide many of the advantages of tissue microarrays without substantial investment in planning and equipment. A critical component of any multi-tissue analysis is the orientation method used to identify each individual tissue. Although methods exist to maintain proper orientation and identification of tissues in multi-tissue blocks, most are not well-suited to non-arrayed blocks, may consume valuable space within an array and/or are difficult to produce in the standard histology laboratory. The Specimen Orientation Tag (SpOT) is a simple, low cost orientation tool that is clearly visible in paraffin blocks and all tissue sections for reliable specimen identification in arrayed and non-arrayed layouts. The SpOT provides advantages over existing orientation methods for non-arrayed blocks as it does not require any direct modification to the tissue and allows for flexibility in the arrangement of tissue pieces.
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