case_images: PMC3861854_01
case_images: Chest X-ray shows a posterior mediastinal mass.
case_images: cro-0006-0579-g01.jpg
case_images: PMC3861854_01_cro-0006-0579-g01.jpg
case_images: F1
case_images: Initial chest X-ray showed a mass in the mediastinum (fig. 1).
case_images: Chest CT shows a posterior mediastinal mass.
case_images: cro-0006-0579-g02.jpg
case_images: PMC3861854_01_cro-0006-0579-g02.jpg
case_images: F2
case_images: A CT scan of the chest with contrast revealed a hypodense, soft tissue mass/lymphadenopathy in the posterior mediastinum measuring 2.0 x 3.0 cm, contiguous with the esophagus (fig. 2), suggestive of neoplastic etiology.
case_images: Tumor tissue with spindle-shaped cells. Original magnification, x40.
case_images: cro-0006-0579-g03.jpg
case_images: PMC3861854_01_cro-0006-0579-g03.jpg
case_images: F3
case_images: The Ki67 index was 3-5% and, finally, the sample was reported as spindle cell well-differentiated leiomyosarcoma (fig. 3).
case_images: Tumor tissue with spindle cells confirmed as GISTs with CD117 immunostaining.
case_images: cro-0006-0579-g04.jpg
case_images: PMC3861854_01_cro-0006-0579-g04.jpg
case_images: F4
case_images: Given the possibility of a GIST, CD117 immunostaining was requested and yielded a positive result (fig. 4).