Desmopressin test during
petrosal sinus sampling: a valuable tool to discriminate pituitary or ectopic ACTH- dependent Cushing's syndrome.
Patterns of evolutionary transformation in the
petrosal bone and some basicranial features in marsupial mammals, with special reference to didelphids.
The following extracranial veins join the internal jugular vein in its passage through the neck; the inferior
petrosal sinus, pharyngeal plexus, facial vein, lingual vein, superior thyroid veins, middle thyroid vein, and jugular lymph trunk.
Thereafter, hashed abdominal fat combined with human fibrin sealant is injected into the middle ear cavity, remaining dissected utricle, saccule, and cells of the
petrosal apex around the IAC.
1: Occipital bone; 2: Parietal bone; 3: Frontal bone; 4: Frontal sinus; 5: Sphenoid bone; 6:Occipital bone; 7:Atlas; 8:Axis; 9: Nuchal ligament; 10: Dorsal rectus muscle of the head, 11: Semispinalis capitis muscle; 12: Ventral rectus muscle and long muscle of the head; 13: Olfactory lobe; 14: Left cerebral hemisphere; 15:Cerebellum; 16: Spinal cord; 17: Epidural rostral rete, rostral part; 18:Rostral cavernous sinus; 19: Caudal cavernous sinus; 20: Ventral
petrosal sinus; 21: Basilar venous plexus; 22:Occiput atloi'dien venous plexus; 23:Internal vertebral venous plexus.
Taste sensation from the taste buds is also supplied by the greater
petrosal, vagus, and glossopharyngeal nerves, and it has been reported that cutting the chorda tympani nerve may abolish some inhibition of the glossopharyngeal nerve.
(5) The nerve then makes a sharp turn (genu) and enters the tympanic segment, giving off the greater, lesser, and external
petrosal nerves.
Inferior
petrosal sinus sampling (IPSS) was performed only in one patient and confirmed the diagnosis of CD.
After this change of the CT scan data into a matrix of polygons, the software Cinema 4d[R] R8 XL (Losch et al., 1999) was used to delete the reconstructed areas of the
petrosal bone that cover the bony labyrinth.
The lower clivus involves the jugular tubercule to the foramen magnum and occipital condyle.[2,3,7] The lateral margins of the clivus are the petrooccipital fissures through which the inferior
petrosal sinus empties into the jugular bulb.[2,3,7] The clivus varies from 37 to 52 mm in length and averages 11 mm in width from the anterior narrow portion to 14.3 mm in width at the posterior widest portion.[8] To further simplify this anatomical description, the clivus is the bony floor of the midline of the posterior fossa in which the brainstem sits.
If the source of ACTH cannot be localized conclusively, bilateral inferior
petrosal sinus sampling may be necessary.