A Rare Cause of Cavitary Lesion in the Lung: Richter’s Transformation

<div>(a) Section shows an infiltrate of large atypical cells (H and E, ×400). (b) The neoplastic cells are diffusely CD20 positive (CD20 immunostain, ×400).</div>

Case Reports in Pulmonology

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Figure 5

Figure 5: A Rare Cause of Cavitary Lesion in the Lung: Richter’s Transformation 