CPU architecture is the layout of the cpu, it is its design -- where the cores, caches, etc are placed inside the cpu. Yes, it is important when buying a PC.
Ad. In some patients who suffer from frequent sinus infections or inflamed tonsils, fluid can become trapped and form into a 'pocket.' This sac then becomes a tonsil cyst. Under most circumstances, the doctor might decide to remove the cyst, unless it shows signs of draining on its own.
Thus, a crowding of the brainstem, cerebellum, and tonsils occurs. Crowding pushes the tonsils out of the skull through the opening (foramen magnum) where the spinal cord exits (Fig. 3A). The tonsils put pressure on the spinal cord, blocks CSF flow, and results in the Chiari signs and symptoms. Sometimes a fluid-filled cyst (syrinx) develops within the spinal cord.