Referring to a condition or disease that arises spontaneously or for which the cause is unknown.

The process of enlarging or expanding a hollow organ or part of the body.

फैलाव

English Usage: The radiologist noted a significant dilatation of the blood vessels in the scan.

Hindi Usage: रेडियोलॉजिस्ट ने स्कैन में रक्त वाहिकाओं के महत्वपूर्ण फैलाव को नोट किया।