1231
Angiography and intracoronary ultrasound demonstrated lack of contact between stent and vessel wall in a 15 - mm long segment with maximal aneurysm diameter of 6 . 0 mm .
 aneurysm
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 aneurysm