#cyst  a closed sac that develops abnormally in some body structure
  supertype:  #pathology  any deviation from a healthy or normal condition
  subtype:  #dermoid_cyst__dermoidcyst  a cystic tumor (usually benign) with an epithelium-lined wall and a cavity containing other material
  subtype:  #galactocele  a cystic tumor containing milk or a milky substance (especially in the mammary glands)
  subtype:  #hemorrhagic_cyst__hemorrhagiccyst__blood_cyst__bloodcyst__hematocyst  a cyst containing blood
     subtype:  #cephalhematoma__cephalohematoma  a collection of blood under the scalp of a newborn; caused by pressure during birth
  subtype:  #hydatid  cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis)
  subtype:  #nabothian_cyst__nabothiancyst__nabothian_follicle__nabothianfollicle  a cyst that forms in the nabothian glands of the uterine cervix
  subtype:  #ovarian_cyst__ovariancyst  a cystic tumor (usually benign) of the ovary
  subtype:  #ranula  a cyst on the underside of the tongue
  subtype:  #sebaceous_cyst__sebaceouscyst__pilar_cyst__pilarcyst__wen__steatocystoma  a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked
     subtype:  #chalazion__Meibomian_cyst  a small sebaceous cyst of the eyelid resulting when a Meibomian gland is blocked

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