Sinonasal Lymphoma Presenting as a Probable Sanctuary Site for Relapsed B Acute Lymphoblastic Leukaemia: A Case Report and Review of the Literature

<div>Histology of the nasal septal biopsy. (a) H&amp;E High Power showing immature cells with hyperchromatic nuclei, occasional nucleoli, and high nuclear cytoplasmic ratios. (b) CD34 immunohistochemistry: positive membranous staining (CD34 marker of immature cells). (c) PAX-5 immunohistochemistry: positive nuclear staining (PAX-5 is a broad-spectrum B-lymphoid lineage marker). (d) Tdt immunohistochemistry: positive nuclear staining (Tdt marker of immature cells, favouring lymphoblastic lineage).</div>

Case Reports in Hematology

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Figure 1

Figure 1: Sinonasal Lymphoma Presenting as a Probable Sanctuary Site for Relapsed B Acute Lymphoblastic Leukaemia: A Case Report and Review of the Literature 

Figure 1 | Sinonasal Lymphoma Presenting as a Probable Sanctuary Site for Relapsed B Acute Lymphoblastic Leukaemia: A Case Report and Review of the Literature 