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Updated: Aug 11, 2026
Methods to Enable Spatial Transcriptomics of Bone Tissues
Published on: May 3, 2024
Ewing's sarcoma of bone: the detection of specific transcripts in a large, consecutive series of formalin-fixed,
D C Mangham1, A Williams, D J McMullan
1Department of Musculoskeletal Pathology, Royal Orthopaedic Hospital, The Medical School, University of Birmingham, Birmingham, UK. chas.mangham@rjah.nhs.uk
Aims:
(i) To report on the routine use of the reverse transcriptase-polymerase chain reaction (RT-PCR) technique on decalcified or non-decalcified, formalin-fixed, paraffin-embedded tissue (FFPET) for translocation detection, with particular emphasis on improved RNA extraction methodology and the use of PCR primers designed to generate small amplicons. (ii) To report on the relative incidences of translocation types and transcript variants in a large, single institution series of Ewing's sarcoma of bone.
Methods And Results:
Using RT-PCR to detect specific transcript variants, we analysed FFPET from 54 consecutive cases of Ewing's sarcoma of bone. We used 'gold standard' detection methods on corresponding fresh and fresh frozen tissue to validate the technique. We have demonstrated the effective use of RT-PCR on decalcified and non-decalcified FFPET samples for sarcoma-specific translocation detection (96% sensitivity, 100% specificity). Tissue decalcification did not affect the detection rate. The relative incidence of Ewing's sarcoma-specific translocation types and transcript variants was entirely consistent with previously published data.
Conclusions:
With equal effectiveness, RT-PCR can be applied to both acid decalcified and non-decalcified FFPET for (Ewing's sarcoma) translocation detection and the technique can be introduced into routine practice in histopathology departments.
