Fair enough mshusband, why don't we do just what you suggest.
"The veins of the neck, which return the blood from the head and face, are: the
Posterior External Jugular,
"The Internal Jugular Vein collects the blood from the interior of the cranium, from the superficial parts of the face and from the neck. It runs down the side of the neck ... and at the root of the neck unites with the subclavian vein to form the innominate vein"
"Veins of the Upper Extremity and Thorax
The veins of the Upper Extremity are divided into two sets, superficial and deep.
The Deep Veins of the Upper Extremity follow the course of the arteries, forming their venae comites.
The Azygos Veins connect together the superior and inferior venae cavae, taking the place of those vessels in that part of the chest occupied by the heart."
It should be noted that when Gray said the cranium, he meant the skull bones, not the brain. The Azygos is nowhere near the brain.
The veins that I suspect Gray would most associate with MS if he were alive today would be the Cerebral Veins: Superficial Cerebral, Superior Cerebral, Median Cerebral, Inferior Cerebral, Deep Cerebral (venae Galeni), vena corporis strati, choroid vein, Basilar vein and Cerebellar vein. These are the veins which actually serve the brain proper.
All quotes from: Gray's Anatomy - Revised American from the 15th English edition.