1. relating to or denoting a cyst or sinus containing hair, typically occurring at the base of the spine
Usage: medical term; usually used in the phrase 'pilonidal cyst' or 'pilonidal sinus'

Examples

• The patient was diagnosed with a pilonidal cyst that required surgical removal.
• Pilonidal sinus disease is more common in young adults and males.
• The doctor recommended treatment for the pilonidal condition to prevent infection.
• Pilonidal cysts can cause pain and discomfort if left untreated.