#ectasia__ectasis__ectasi  dilatation or distension of a hollow organ
  supertype:  #dilatation__distension  the state of being stretched beyond normal dimensions
  subtype:  #lymphangiectasia__lymphangiectasis  dilatation of a lymph vessel
  subtype:  #alveolar_ectasia  abnormal enlargement of the air sacs in the lungs

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