Chemical Engineer Employment & Salaries. As of 2014, the US Department of Labor estimated there were 34,300 chemical engineers in the United States. At the time of the survey, the average hourly wage for a chemical engineer was $46.81 per hour. The median annual salary for a chemical engineer was $97,360 as of 2015.
Symptoms of Spinal Cysts. Patients with a spinal cyst may not experience any symptoms if the cyst remains small and stable. As the cyst progresses and becomes more severe, it may cause pain in the back that travels down the legs as well, and can also lead to spinal stenosis, which may cause pain, cramping and numbness.
Less frequently, a popliteal cyst arises quickly due to a knee cartilage, muscle or ligament injury. These cysts often produce a visible lump at the back of the knee, accompanied by achy pain. There may be pain or difficulty when bending or fully straightening the knee.