case_images: PMC8826096_01
case_images: CT scans demonstrating the right lower lobe mass.
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case_images: Chest radiographs and high-resolution computed tomography (HRCT) demonstrated a soft tissue mass arising from the right lower lobe bronchus and abutting middle lobe bronchus (Figure 1).
case_images: PET scan demonstrating PET avidity within the mass.
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case_images: FDG-PET scan demonstrated the 70 mm x 80 mm mass had a standardised uptake value (SUV) of 6.4 and there was a sub-centimetre subcarinal node with an SUV of 4.5 (Figure 2).
case_images: Gross appearance of the right lower and middle lobe with the tumour seen occluding the lower lobe bronchus.
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case_images: Histopathological evaluation of the lung resection revealed a firm 19-mm well-circumscribed grey fibrous tumour beneath the middle lobe bronchus arising from the submucosa of the lower lobe bronchus and sub-totally obliterating the lumen (Figure 3).
case_images: Microscopic overview of the whole lesion at 0.25x magnification demonstrating the compressed bronchial lumen overlying the lesion.
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case_images: The mass lesion comprises plump spindle cells arranged in fascicles and whorls, the latter arranged in an onion-skin pattern around small arterioles (Figures 4 and 5).
case_images: Microscopic appearance at 5x magnification showing the morphology of the lesion, including thick collagen bundles, pseudoangiomatous stromal clefting, interspersed bland spindle cells and foci of punctate calcification.
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case_images: The mass lesion comprises plump spindle cells arranged in fascicles and whorls, the latter arranged in an onion-skin pattern around small arterioles (Figures 4 and 5).