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.
Many dog owners mistake tapeworms for pinworms because the worms look similar. Both parasitic worms attach in the intestines where the adult worms lay eggs. At times, you may see small tapeworm segments outside the anus, much like pinworms crawl from the anus. This explains why many people confuse the two.