ABSTRACT
This paper presents anatomy and topography of the inconstant osseous bridges that may occur in the sella turcica region. The interclinoid bridge and the caroticoclinoid bridge can be formed in consequence of abnormal ossification of the dural folds or disturbances in development of the sphenoid bone. Their presence may be of clinical importance because of potential influence on the neurovascular structures passing in the vicinity of the clinoid processes of the sphenoid bone.
Subject(s)
Ossification, Heterotopic/pathology , Sella Turcica/anatomy & histology , Sella Turcica/ultrastructure , Adult , Female , Humans , Male , Middle Aged , Ossification, Heterotopic/physiopathology , Osteogenesis/physiology , Sella Turcica/physiologyABSTRACT
Two cases of sellar chordomas are reported, with ultrastructural and histochemical study. The embryological origin and the histochemical data are discussed. The question of chondroid chordomas is evoked and the results of the ultrastructural study are interpreted on the basis of the cases hitherto reported. Special attention is called to the methods for the detection of polysaccharides by electron microscopy in such proliferations. Tissue culture seems to be able of providing a good information as to the secretory activity of the chordomas located at the skull base.
Subject(s)
Chordoma/ultrastructure , Sella Turcica/ultrastructure , Skull Neoplasms/ultrastructure , Chordoma/metabolism , Female , Histocytochemistry , Humans , Male , Microscopy, Electron , Middle Aged , Sella Turcica/metabolism , Skull Neoplasms/metabolismABSTRACT
Primary intracranial tumors of mesenchymal origin are exceedingly rare. This study describes the light microscopic and ultrastructural features of a leiomyosarcoma localized to the sellar and suprasellar region in a 35-year-old man. The probable origin of this tumor from blood vessels is discussed.
