Deathwatch beetle. Deathwatch beetle (Xestobium rufovillosum), an anobiid, or borer insect, of the family Anobiidae (insect order Coleoptera) that makes a ticking or clicking sound by bumping its head or jaws against the sides of the tunnels as it bores in old furniture and wood.
1 Superior vena cava syndrome is most often caused by compression of the vein (the superior vena cava), that returns blood from the upper body back to the right atrium of the heart by tumor.  Symptoms include swelling of the face and arms associated with shortness of breath.
In some instances of spinal stenosis, the patient may report no symptoms. Typically, though, symptoms tend to emerge slowly and progressively worsen over time. Some of the most common symptoms of spinal stenosis include: Occurring most frequently among adults over the age of 50, spinal stenosis involves the narrowing of the spinal canal, leading to compression of the spinal cord and nearby nerves.