Myeloid sarcoma with ulnar nerve entrapment: A case report

Figure 1 X-ray and magnetic resonance images. A and B: No significant abnormality on antero-posterior (A) and lateral (B) X-rays of the left elbow joint; C and D: Sagittal (C) and coronal (D) magnetic resonance images (MRI) showing significant abnormal signal in the left brachial plexus; E and F: Coronal MRI showing significant abnormal signal in the left brachial plexus. The red arrow points to the lesion.

Figure 2 Intraoperative and histological images. A: Intraoperative thickening and degeneration of the left ulnar nerve; B: Hematoxylin and eosin-stained section showing neuroepithelial and lymph node pathology.

Figure 3 Histopathology of myeloid sarcoma. Immunopathological examination shows tissue of lymphohaematopoietic lineage. A: CD21; B: Ki-67; C: LCA; D: MPO; E: CD117; F: CD34.