case_images: PMC3902556_01
case_images: Video-assisted thoracoscopic image of the posterior mediastinal mass
case_images: JMAS-10-34-g001.jpg
case_images: PMC3902556_01_JMAS-10-34-g001.jpg
case_images: F1
case_images: Inspection of the left hemithorax revealed a 2.5 cm mass in the left paravertebral area near the apex of the lung [Figure 1].
case_images: (a) Submucosal mass in hepatic flexure (b) Endoscopic appearance of the operative field after excision
case_images: JMAS-10-34-g002.jpg
case_images: PMC3902556_01_JMAS-10-34-g002.jpg
case_images: F2
case_images: After a 9 month of follow-up, screening colonoscopy revealed a submucosal mass measuring approximately 1 cm in diameter [Figure 2a]. The mass was excised en bloc by endoscopic mucosal resection (EMR) using a snare [Figure 2b].
case_images: (a) Tumour with granular cells, beneath the colonic surface epithelium (H and E x200), (b) Positive for Periodic acid-Schiff (PAS x200), (c) Diffuse and strong S-100 protein positivity in the tumour (immunohistochemical staining, S-100 protein)
case_images: JMAS-10-34-g003.jpg
case_images: PMC3902556_01_JMAS-10-34-g003.jpg
case_images: F3
case_images: H and E-stained sections of the lesion revealed a tumour, which was located in the submucosa and partly in the mucosa [Figure 3a]. The tumour cells with abundant granular eosinophilic cytoplasm were containing acidophilic Periodic acid-Schiff (PAS)-positive diastase-resistant granules [Figure 3b]. Immunohistochemical analysis revealed diffuse expression of S100 protein [Figure 3c].