Fig. 16

Desmoid tumour that extends along the left erector spinae aponeurosis in a 39-year-old male with recent trauma and pain. T2WI demonstrates a circumscribed mass with high intensity (a). MRI performed 3 months later shows a fast-growing tumour (b, c, d). The desmoid tumour is hyperintense to muscle in T2WI (b) and T1WI (c) and enhances on contrast-enhanced T1WI (d). US performed in transversal (e) and longitudinal plane (f) shows a well-defined hypoechoic mass onto the erector spinae aponeurosis (arrowheads). The yellow star shows the epicentre of the mass