The submucosal layer consists of a highly cellular stroma of spindle cells with elongated nuclei similar to the “ovarian stroma” which is a key pathologic feature distinguishing these lesions.

Being immortal, mitotically competent and located in tissues in which tumours appear, stem cells are likely candidates to initiate tumor growth ... Proper spindle alignment is key for the correct ...

Many cells were swollen and disorganized. In the dermis, epithelioid and spindle-shaped tumor cells, demarcated by thin fibrous trabeculae, were arranged in interweaving bundles. Due to the ...