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FIG 4. Images in a 62-year-old woman with a dural AVF draining into the left cavernous sinus (case 6).
A, Digital subtraction angiogram reveals the AVF draining into the left cavernous sinus.
B–E, Pretreatment dynamic MR images of the anterior pituitary gland. In phase 0 (B) and in the first (C), second (D), and third (E) phases, the enhancement of the left side of the pituitary gland is delayed (arrow in C–E). In phase 0, the left cavernous sinus is already enhancing because of the AVFs, but no enhancement can be seen in the pituitary gland; this is why this image was defined as phase 0.
F–I, Posttreatment dynamic MR images in phase 0 (F) and in the first (G), second (H), and third (I) phases. After treatment of the disease, the laterality of the enhancement on early dynamic images became less prominent, and the height of the pituitary gland decreased from 8 to 7 mm. In this case only, the laterality of the enhancement somewhat remained after treatment (arrow in G).
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