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Insights into Imaging
Fig. 9 | Insights into Imaging

Fig. 9

From: Diagnostic methods and therapeutic options of uveal melanoma with emphasis on MR imaging—Part I: MR imaging with pathologic correlation and technical considerations

Fig. 9

A 55-year-old man with a bipartite choroidal melanoma of the left eye. Axial (a) T2-weighted turbo spin-echo STIR and (b) fat-suppressed T1-weighted images show an intraocular bilobate mass with bipartite pigmentation along the postero-medial aspect of the globe. The medial portion of the lesion (white arrowheads) exhibits intermediate signal intensity on both T2- and T1-weighted images, whereas the posterior portion (white arrows) demonstrates predominantly low signal intensity on T2-weighted image and high signal intensity on T1-weighted image, due to melanin pigmentation. Laterally to the lesion a retinal detachment is better depicted on fat-suppressed T1-weighted image (white dotted arrow in b). (c) Histological examination: low magnification confirming the bilobate morphology of the melanoma, consisting of a less pigmented medial portion (on the left) and a more pigmented posterior component (on the right) (H&E, original magnification ×25)

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