Diseases	Distribution								Clinical presentations			Others
	Zones
	U	M	L	SP	C	R	BV	R	Acute	Subacute	Chronic
COP		+	+	+			+			+	+	Nodules, reversed halo sign
CEP	+	+		+				+		+	+	Asthma in 40 % of patients
CSS	+	+	+			+		+		+	+	Asthma in all patients, airway disease components
Radiation pneumonitis	+	+	+			+		+		+	+	Usually irradiated region; consolidation beyond irradiated field, hypersensitivity pneumonitis?

Note: COP cryptogenic organizing pneumonia, CEP chronic eosinophilic pneumonia, CSS Churg–Strauss syndrome, U upper, M middle, L lower, SP subpleural, C central, R random, BV bronchovascular