Extranodal Locatio of Lymphoma: Presentation and Evolutionary in Senegalese Patients

Introduction: The frequency of extranodal involvement in lymphoma is not rare, but variously described by authors in Africa. The objective of our work is to describe the profile of patients followed for lymphoma with extranodal locations. Methods: We conducted a descriptive, retrospective and analytic study at the clinical hematology department of Dalal Jamm Hospital, from September 2016 to June 2022. We included patients with a diagnosis of lymphoma immunohistochemistry, with extranodal involvement. The epidemiological, diagnostic, prognostic and survival aspects were studied. Results: Fifty-two (52) patients with extranodal localizations of their lymphoma were included. The mean age was 44.2 ± 17.6 years and the sex ratio was 1.2. The average time to diagnostic was 9.4 ± 3.6 months. We found a performance status ≥ 2 in 65.4% and at least one B symptom in 71.2% of cases. The extranodal manifestations were digestive (19%), cutaneous (17.5%), pleuropulmonary (17.5%), bone marrow (4.8%), thyroid (1.6%), parotid gland (1.6%) and breast (1.6%). Patients presented with Hodgkin’s lymphoma (HL) in 19.2% of cases and non-Hodgkin’s lymphoma (NHL) in 80.8% of cases. At the end of the extension checkup reviews, 61.5% were at an advanced stage and prognostic indices were unfavorable in 32% of patients. Conventional chemotherapy was conducted in 63.5% of patients of which 24 had NHL and 9 had HL. Immuno-chemoterapy was used in 26.9% of patients (13 cases of NHL, 1 case of HL). During the follow-up, we noted only 29.7% of complete remission. The median overall survival was 25.1 months [23.5 - 34.1 months] in HL group and 20.5 months [18.7 - 72.2 months] in NHL patients (p = 0.14). Conclusion: Our study shows that extranodal involvements of lymphomas are various, encountered more during NHL. In our practice, diagnosis is generally made at an advanced stage, with poor response to treatment.