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Insights into Imaging
Fig. 2 | Insights into Imaging

Fig. 2

From: Grading and characterization of soft tissue tumors on magnetic resonance imaging: the value of an expert second opinion report

Fig. 2

a-c Pigmented villonodular synovitis in a 31-year-old man, misdiagnosed as a malignant lesion by the referring institution. a Axial SE T1-WI. Lobulated intra-articular lesion at the left metatarsophalangeal joint of the hallux (black arrows). Note the presence of erosions on both sides of the joint (black arrowheads). The lesion is of overall low signal. b Axial TSE T2-WI. The lesion is still of very low signal (black arrows). c Axial fat suppressed SE T1-WI after IV administration of gadolinium contrast. Marked enhancement of the lesion (black arrows). Despite the aggressive behavior of the lesion (erosions), the low signal of the lesion on both pulse sequences (in keeping with hemosiderin deposition), the articular location of the lesion, the marked enhancement and the relatively young age of the patient allowed a correct tissue-specific diagnosis by the expert center

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