Correct!

5. All of the above

He has many abnormalities on his CT scan which are not all accounted for by pleural effusions and pulmonary edema.

The following additional laboratory tests were ordered:

• Anti-SSA 3.3 U, RA 30 IU/ml
• Coccidiomycosis: negative
• HIV: negative
• Quantiferon TB/AFB: negative
• Sputum culture, viral PCR: negative
• Hepatitis C viral load: 1681
• Negative: ANCA, ANA, CCP, Anti-jo, RNP/SM, SS-B, anticentromere
• CT angiogram demonstrated no pulmonary embolus.

Based on these findings which of the following are reasonable differential diagnosis possibilities? (click on correct answer to move to next panel)

1. Atypical infection
2. Hypersensitivity reaction/talc pneumonitis due to prior IV drug use
3. Idiopathic interstitial pneumonia
4. Sjogren’s disease or other connective tissue disease associated pulmonary disease
5. All of the above

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