ectases

/ˈɛktəsiːz/
noun
  1. Plural of ectasis; a medical term for the dilation or expansion of a tubular structure in the body, such as a blood vessel or duct.
    • Mammary duct ectases can cause discomfort and discharge.
    • The scan revealed several ectases in the patient's coronary arteries.
    • Doctors monitor vascular ectases to prevent potential ruptures.