Fig. 10
From: Orbital tumours and tumour-like lesions: exploring the armamentarium of multiparametric imaging
65-year-old male patient with undifferentiated ductal carcinoma of the right lacrimal gland (mammary analog secretory type). a. Axial NECT of the orbits shows a well-circumscribed, hyperdense mass with stippled calcifications involving the right lacrimal gland. The calcifications were misdiagnosed as phleboliths, which led to the initial diagnosis of a cavernous hemangioma. b. Axial T2W MR image of the same patient shows that the lacrimal gland mass has a very hypointense posterior component (thick arrow) and an anterior moderately hypointense portion (thin arrow). c. Corresponding axial T1W MR image shows that the mass is isointense to the rectus muscles. d. ADC map reveals restricted diffusion (ADC = 0.9 × 10 −3 mm2/s), suggesting a malignant tumour. e. Coronal FS contrast-enhanced T1 W image shows moderate tumour enhancement and lobular appearance. f. Photomicrograph (original magnification 100x, H&E stain) shows a highly cellular tumour with atypical nuclei and mitoses and areas of necrosis (asterisk). There were numerous areas of microscopic perineural spread and lymphatic invasion not detected by imaging