Fig. 9
From: Orbital tumours and tumour-like lesions: exploring the armamentarium of multiparametric imaging
42-year-old female patient with BMT of the left lacrimal gland. a. Axial T2W MR image shows a well-circumscribed polypoid mass (thick arrow) of moderately hypointense signal involving the left lacrimal gland. Note small satellite nodules (thin arrows). b. Corresponding T1W image shows non-specific lesion hypointensity (arrow). c. ADC map reveals increased diffusion (ADC = 1.6 × 10 −3 mm2/s). d. Coronal contrast-enhanced FS T1W MR image of the same patient demonstrates strong enhancement within the mass (thick arrow) and within the peripheral nodules (thin arrows). e. Sagittal reformatted 0.6 mm thin image from contrast-enhanced 3D VIBE better illustrates scalloping of the orbital roof by the peripheral “grape-like” nodules (thin arrows). e. Photomicrograph of the surgical specimen (original magnification 100x, H&E stain) illustrates the characteristic histological features of pleomorphic adenoma with medium sized cells with an eosinophilic cytoplasm and myoepithelial cells (small asterisk) partly surrounded by a myxoid matrix (large asterisk). The peripheral nodules seen on MRI corresponded histologically to pseudopodia and satellite nodules. Bony invasion by pseudopodia was confirmed histologically