Fig. 4
A 39-year-old female patient with ARMS. a T1-weighted and b, c, d T1-weighted fat-suppressed postcontrast images show an irregular soft tissue mass (triangle) in the right ethmoid sinuses with right retropharyngeal lymph node metastasis (thick white arrow). The size of the mass is 4.6 × 3.6 × 4.2 cm3 and the margin is ill-defined. After contrast enhancement, the mass is enhanced markedly and heterogeneously. Orbit involvement (thin white arrow) and skull involvement (thin black arrow) can be seen. e DWI shows slightly high signal in the mass (triangle). f ADC map shows a low signal (triangle) with measured ADC of 0.863 × 10–3 mm2/s