(A) Low power view of case 1 showing needle tract containing displaced epithelium (single arrow) directed towards the capsule of the papillary tumour and the granulation tissue and tumour adjacent to the predicted point of rupture (double arrow). (B) Low power view of case 2 showing needle tract (single arrow) directed towards the capsule of the papillary tumour. (C) Needle tract of case 1 showing granulation tissue associated with groups of displaced cells. (D) Needle tract of case 2 showing apparent vascular invasion. (E) Apparent vascular invasion in case 2. (F) Immunohistochemistry for CD34 showing no positivity in cells lining the space containing tumour.