PT - JOURNAL ARTICLE AU - Beier, Marie AU - Sack, Ingolf AU - Beck-Broichsitter, Benedicta AU - Hamm, Bernd AU - Marticorena Garcia, Stephan Rodrigo TI - Tomoelastography for non-invasive detection of ameloblastoma and metastatic neck lymph nodes AID - 10.1136/bcr-2020-235930 DP - 2020 Sep 01 TA - BMJ Case Reports PG - e235930 VI - 13 IP - 9 4099 - http://casereports.bmj.com/content/13/9/e235930.short 4100 - http://casereports.bmj.com/content/13/9/e235930.full SO - BMJ Case Reports2020 Sep 01; 13 AB - Ameloblastoma is a benign epithelial tumour and the most common odontogenic tumour, accounting for about 18% of cases. We present a patient to illustrate the first use of tomoelastography for quantitatively mapping tissue stiffness (shear wave speed) and fluidity (loss angle of the complex shear modulus) in a metastasised ameloblastoma of the left mandible. Tomoelastography maps clearly depicted the extent of the tumour by abnormally high values of stiffness and fluidity (1.73±0.23 m/s, 1.18±0.08 rad) compared with normal values in the contralateral mandible (1.04±0.09 m/s, 0.93±0.12 rad). Abnormal stiffness also revealed metastatic involvement of the neck lymph nodes (1.30±0.03 m/s vs 0.86±0.01 m/s). Taken together, stiffness and fluidity measured by tomoelastography can sensitively detect the presence and extent of bone tumours and metastatic spread to cervical lymph nodes.