Toddler with a palpable bump on the back of the head just to the left of midline

MRI of soft tissue hemangioma of the scalp
Axial T2 MRI without contrast of the brain (above) shows a well defined lesion in the subcutaneous tissues just to the left of midline that has heterogenous signal intensity. The lesion shows primarily low signal intensity on axial T1 MRI without contrast (below left) and enhances markedly and fairly uniformly on axial T1 MRI with contrast and fat saturation (below right).

The diagnosis was soft tissue hemangioma.