History

A 45-year-old, otherwise healthy women, was referred to our department for an MRI of the brain (Fig. 1), because of chronic headache. A subsequent CT scan (Fig. 2) and cerebral angiogram was performed (Fig. 3). An endoscopic transsphenoidal biopsy of the clival lesion was performed, the histology of which is illustrated in Fig. 4.

Fig. 1
figure 1

Axial T2-weighted (a), sagittal non-enhanced T1-weighted (b), and axial T1-weighted image (c) after gadolinium contrast administration

Full size image
Fig. 2
figure 2

Axial CT scan (bone window)

Full size image
Fig. 3
figure 3

Cerebral angiogram (late arterial phase)

Full size image
Fig. 4
figure 4

Histopathology of the biopsy specimen

Full size image