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 ...

On the basis of the appearance of sections of the mass stained with hematoxylin and eosin, we made a diagnosis of a spindle cell tumor (Fig. 2). Such tumors are a highly heterogeneous group that ...