RT Journal Article SR Electronic T1 Unusual cause of tooth mobility JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e235086 DO 10.1136/bcr-2020-235086 VO 13 IS 12 A1 Yazan Hassona A1 Mohammad Wael Saleh A1 Hamza Alkhawaldeh A1 Ruba Al Abweh YR 2020 UL http://casereports.bmj.com/content/13/12/e235086.abstract AB We describe a case of a 71-year-old otherwise healthy man who presented to the dental clinic with the chief complaint of mobility involving his upper left molar teeth. The patient was a febrile, and clinical oral examination revealed localised grade II mobility and absence of gingival swelling, erythema or sinus tract. Orthopantogram revealed a poorly defined radiolucency involving the upper left second and third molar teeth. Surgical exploration of the involved area was performed and revealed the presence of a ‘jelly like’ brown tissue that fragments easily. Pathological examination confirmed the diagnosis of diffuse large B cell lymphoma.