case_images: PMC6198544_01
case_images: (a) Normal bone marrow biopsy demonstrating a predominance of erythroid precursors (note cells with round, dark nuclei). This image was originally published in ASH Image Bank. Peter Maslak. Normal adult bone marrow. ASH Image Bank. 2010; Trephine Biopsy-2.  The American Society of Hematology. (b) Bone marrow biopsy taken from the patient, demonstrating marked reduction in erythroid precursors.
case_images: CRIHEM2018-8627145.001.jpg
case_images: PMC6198544_01_CRIHEM2018-8627145.001.jpg
case_images: fig1
case_images: Bone marrow biopsy demonstrated a marked reduction in erythroid precursors (two percent of the differential) consistent with pure red cell aplasia (Figure 1).
case_images: Thymoma on noncontrast chest computed tomography.
case_images: CRIHEM2018-8627145.002.jpg
case_images: PMC6198544_01_CRIHEM2018-8627145.002.jpg
case_images: fig2
case_images: A chest computed tomography was performed revealing an anterior mediastinal mass consistent with thymoma (Figure 2).