This patient went on to have resection of the mass. 


The tumour  comprises  solid  islands,  some with  a fragmented  and  papillary outline, of well-differentiated  squamous epithelium  embedded in a densely collagenous   and   vascularised   stroma,   which  shows  patchy   chronic inflammation. The tumour does not show  a well-developed picket fence basal epithelial layer, and stellate reticulum-like areas and wet keratin are not identified. Focally,  the tumour shows  areas of haemorrhage,  and there is one fragment showing haemorrhagic infarction. There is patchy infiltration by neutrophils.  

 DIAGNOSIS: Papillary craniopharyngioma, WHO grade 1.