Résumé
An unusual case of extramedullary relapse in a known case of T cell lymphoblastic lymphoma is presented here. The patient is a 24-year-old girl diagnosed with T cell lymphoblastic lymphoma in June 2020. The patient th showed extramedullary relapse in the gastrointestinal mucosa without bone marrow recurrence whilst on the 6 month of BFM (Berlin Frankfurt Munster) -90 maintenance. Isolated gastrointestinal infiltrate is unusual at presentation or relapse of T cell lymphoblastic lymphoma. While on BFM-90 maintenance, she presented with multiple vomiting and abdominal pain episodes. Upper gastrointestinal scopy revealed multiple gastric ulcers, with morphology and immune-phenotyping identical to her initial T cell lymphoblastic lymphoma. We could not find evidence of leukaemic activity in the blood, cerebrospinal fluid or bone marrow. Several types of leukemic infiltrates have been recognised at post-mortem examination; the fact that makes our case is unique is T cell lymphoblastic lymphoma presenting as an isolated malignant ulcer, which to the best of our knowledge, has not been reported. We conclude that relapsed T cell lymphoblastic lymphoma may present with gastrointestinal infiltration. Further investigations are warranted to establish the same