PMC6339743_01
Contrast-enhanced CT of the chest. (a) Axial, (b) sagittal, and (c) coronal reformatted images revealing a well-defined anterior mediastinal mass, abutting the heart showing heterogeneous enhancement with pericardial invasion without any evidence of myocardial, aortic, or pulmonary artery involvement.
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Past medical history revealed that he was treated 11 years ago for a malignant SFT in the anterior mediastinum (Figures 1 and 2) by complete excision followed by radiotherapy.
(a) Microscopic examination of the excised mediastinal lesion demonstrating tumour necrosis. (b) Spindle cells with haemangiopericytomatous pattern. (c) Moderate cytological atypia and mitoses. (d) Strong positive immunohistochemical staining for CD34.
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Past medical history revealed that he was treated 11 years ago for a malignant SFT in the anterior mediastinum (Figures 1 and 2) by complete excision followed by radiotherapy.
(a-d) MRI neck. (a, b) The mass at the left parotid space with slightly high signal intensity to the muscles on both axial T1 and T2 spin echo MR weighted images. (c, d) Coronal and axial postcontrast axial fat suppressed T1 MR weighted images demonstrate avid homogenous enhancement of the tumour.
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T1- and T2-weighted images and homogeneous enhancement postcontrast and restricted diffusion (Figure 3). The right parotid and submandibular glands appeared normal.
Hematoxylin and eosin staining at low magnification (200x) and high magnification (400x) showing a solid tumour in the parotid gland, with cords and nests of spindle-type cells. Immunoperoxidase staining positive for CD34 and BCL-2. STAT6 immunostain shows diffuse staining of the SFT cells.
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fig4
Histopathological examination of tumour (Figure 4) following left-sided superficial parotidectomy showed plump spindle-shaped cells with indistinct cytoplasmic borders and some variation in nuclear size.