It is a form of lung disease that looks like ground glass on x-ray and CT scans.

The most common causes of ground-glass opacity include usual interstitial pneumonia, nonspecific interstitial pneumonitis, desquamative interstitial pneumonia, hypersensitivity pneumonitis, pulmonary oedema and pulmonary haemorrhage, and pneumonias (particularly pneumocystis carinii pneumonia). Less common causes include alveolar proteinosis, acute interstitial pneumonia or other causes of diffuse alveolar damage or the adult respiratory distress syndrome, respiratory bronchiolitis and early radiation pneumonitis.

Takeo Kimura died on March 21, 2010, in Tokyo, Japan of interstitial pneumonia.

The suffix for idiopathic is "-ic" which means "pertaining to."

The opposite word for Idiopathic would be a specific diagnosis! Idiopathic in itself means unknown cause

Idiopathic means without known cause.
The medical term meaning 'without a known cause' is Idiopathic.
Idiopathic
Idiopathic
Idiopathic