Transsphenoidale

Transsphenoidale (transsphenoidal) refers to anything passing through or situated in relation to the sphenoid bone of the skull. The term is most frequently used in anatomy and neurosurgery to describe a surgical route to the sellar region, including the pituitary gland, via the sphenoid sinus.

Etymology and usage

The word derives from Latin: trans- meaning through and sphenoidale relating to the sphenoid bone. In medical literature, transsphenoidal describes approaches or structures that traverse the sphenoid bone or sinus, especially as a route to the sellar and parasellar areas.

Anatomy and route

The transsphenoidal route generally begins in the nasal cavity, proceeds through the sphenoid ostium into the sphenoid sinus, and locates the sellar floor to access the sella turcica. This corridor allows direct access to the pituitary gland and nearby neurovascular structures with typically limited brain retraction compared with some transcranial approaches. Modern techniques frequently use an endoscopic endonasal port, improving visualization and reconstruction options.

Indications and evolution

Transsphenoidal approaches are used for treating sellar and suprasellar lesions, most notably pituitary adenomas, as well as craniopharyngiomas, meningiomas near the sella, and Rathke’s cleft cysts. Historically developed in the early 20th century and refined over time, the modern standard often employs endoscopic visualization and skull base reconstruction to reduce complications.

Risks and complications

Potential complications include cerebrospinal fluid leaks, meningitis, diabetes insipidus, hypopituitarism, nasal morbidity, and vascular injuries to the cavernous sinus or carotid arteries. Outcomes depend on lesion type, extent of resection, and reconstruction success.

See also

Transsphenoidal surgery, endonasal approach, pituitary gland, skull base.