case_images: PMC5241451_01
case_images: Preoperative MRI showed an epidural mass extending from the fifth to the tenth thoracic vertebra canal. (a) Sagittal plane. (b) Axial plane (Th7).
case_images: CRIOR2017-2416365.001.jpg
case_images: PMC5241451_01_CRIOR2017-2416365.001.jpg
case_images: fig1
case_images: MRI of the thoracic spine showed an epidural mass extending from the fifth to the tenth thoracic vertebra (Figure 1).
case_images: Photograph of the thoracic epidural mass. (a) The dorsal epidural mass is continuous from the fifth to the tenth thoracic vertebra canal after laminectomy. (b) The thoracic epidural mass specimen is reddish brown and hematoma like in appearance.
case_images: CRIOR2017-2416365.002.jpg
case_images: PMC5241451_01_CRIOR2017-2416365.002.jpg
case_images: fig2
case_images: The laminal arch of vertebrae from the fourth to the ninth thoracic spine was removed, and the reddish brown continuous mass was excised (Figure 2).
case_images: Histology of the epidural mass. Hematoxylin and eosin staining. Arrows suggest hematopoietic cells. Black, megakaryocytic; red, erythropoietic; yellow, myelopoietic. Magnification x40.
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case_images: PMC5241451_01_CRIOR2017-2416365.003.jpg
case_images: fig3
case_images: Histological examination confirmed the diagnosis of EMH because of the presence of hematopoietic cells differentiated into mature myelopoietic, erythropoietic, and megakaryocytic cells (Figure 3).
case_images: Immunohistochemistry of the epidural mass. High expression of cell surface markers for erythroblasts (glycophorin A), megakaryocytes (CD41), and granulocytes (MPO) was observed. Magnification x40.
case_images: CRIOR2017-2416365.004.jpg
case_images: PMC5241451_01_CRIOR2017-2416365.004.jpg
case_images: fig4
case_images: Furthermore, immunohistochemical analysis of surgical sample was performed by using glycophorin A (DAKO, clone: JC159, 1 : 400) for erythroblasts, CD41 (Calbiochem, clone: 283.16B7, 1 : 2000) for megakaryocytes, and MPO (DAKO, rabbit polyclonal, 1 : 500) for granulocytes (Figure 4).
case_images: MRI taken one year later shows no recurrence. (a) Sagittal plane. (b) Axial plane.
case_images: CRIOR2017-2416365.005.jpg
case_images: PMC5241451_01_CRIOR2017-2416365.005.jpg
case_images: fig5
case_images: A year after the surgery, there were no clinical or radiological signs of recurrence (Figure 5).