It is suggested that the presence of a posterior ledge of the diaphragma sellae
or an intracystic nodule should be pathognomonic of RCC leading to early diagnosis.
Meningiomas affecting the visual pathway originate from the basal meninges of tuberculum sellae, planum sphenoidale, chiasmatic sulcus and from diaphragma sellae
Meningiomas of the sellar/ parasellar region can arise from cavernous sinus, planum sphenoidale, diaphragma sellae
, anterior clinoid processes, tuberculum sellae, medial lesser wing of sphenoid and optic nerve sheath.
Small sella turcica are notable in humans who either have an absent or a partial formed diaphragma sellae
It is important to differentiate the rare diaphragma sellae meningioma from the pituitary adenoma; because their surgical approach is different.
Diaphragma sellae meningiomas are rare lesions and may be hard to differ from pituitary adenomas (1).
Pituitary macroadenoma and diaphragma sellae meningioma: differential diagnosis on MRI.
Meningiomas in this region originate from the tuberculum sella, anterior clinoid processes, diaphragma sellae
, planum sphenoidale and upper clivus (Figure 9).
Other common abnormalities include ectopic calcifications of the falx cerebri, tentorium cerebelli, and diaphragma sellae
, and rib abnormalities, such as bifid, fused, or hypoplastic ribs.
It is covered superiorly by diaphragma sellae
, which is pierced centrally by an aperture for the infundibulum.