PMC6815588_01
Bone marrow biopsy: bone marrow aspiration of the posterior iliac crest revealed normocellular bone marrow 30-40% with granulocytopenia and increased CD3+ T lymphocytes some in aggregates (a). Flow cytometry showed rare to absent B cells and no aberrant immunophenotype on T cells (b).
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A bone marrow biopsy revealed decreased mature granulocytes and granulocytic precursors and increased CD3-positive T lymphocytes in small lymphoid aggregates (Figure 1).
Chest CT: a 4.1 x 8.3 x 7.9 cm mass in the anterior mediastinum with lobulations and dense enhancement (a). Multiple indeterminate nodules throughout the bilateral lungs (b).
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Chest CT scan revealed an 8 cm circumscribed heterogeneously enhancing solid mass in the anterior mediastinum, suspicious for neoplastic process (Figure 2).
Thymoma mixed type A and B2: grossly and microscopically encapsulated thymoma type A (a) showing spindle cells and type B2 (b) showing mixed epithelial cells and lymphocytes. The lymphocytes are positive for CD3 with rare CD20-positive B cells. These lymphocytes are also positive for TdT and CD1a.
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A (Figure 3). A diagnosis of thymoma mixed type A and B2 was given.