Fig. 11

First branchial-cleft cyst and fistulas. Right isolated intraparotid cyst on axial T₂-weighted image (a). Type II anomaly, with an intraparotid cyst and 2 fistulas, the upper fistula running from the cyst to the external auditory canal [white arrow] and the lower running from the cyst to the skin, in Pochet’s triangle [red arrow] (b, c and d). Isolated fistula running from the parotid area to the skin (e). Congenital defect of the floor of the left external auditory canal (tympanal bone) on frontal and axial CT images (f and g)