Describing an organ such as the heart that contracts and relaxes alternately.  

A severe form of spina bifida where the spinal cord pushes through a hole in the spine.  

A swelling of the spinal cord, which results in the formation of cavities in it.  

A benign tumour in sweat glands and ducts.  

Syringomyelia in the brain stem.  

A medical instrument made of a tube with a plunger which either slides down inside the tube, forcing the contents...

A rash or open sore which is a symptom of the second stage of syphilis.  

Made artificially.  

To make a chemical compound from its separate components.  

A tumour in a synovial membrane.