Rheumatoid arthritis (RA) is a common condition affecting around 1% of the population. Around 90% of patients with RA have cervical spine involvement with between 11% and 58% of these patients having neurological involvement.3,4 Many of these patients have cervical myelopathy.
Pinworms are a type of parasite that lives in the digestive system of humans. They are common throughout the world. Adult pinworms are about 0.5 in. (12.7 mm) long and look like little white threads. Pinworm eggs are so tiny, you'd need a microscope to see them.
Pinworms are small, threadlike roundworms found primarily in the colon and rectum. The life cycle of the pinworm  egg, larva, and mature worm  takes place inside the human body and requires from three to six weeks to complete. (Source: excerpt from Parasitic Roundworm Diseases, NIAID Fact Sheet: NIAID)