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Photomicrographs of histopathology and immunohistochemical staining for ALK-1 in inflammatory myofibroblastic tumour. Spindle cells with mild pleomorphism admixed with lymphocytes and plasma cells in a collagenised background (H and E 200×) (A). Granular cytoplasmic staining for ALK-1 in the spindle cells (200×) (B)
