Fig. 1

Radiological findings obtained at another hospital before admission. A X-ray of the hands obtained 13 months before admission showed joint space narrowing at the radiocarpal joint and intercarpal joints of the left hand. Subluxation at multiple sites of the metacarpophalangeal joints was also noted in both hands. B Chest CT taken 11 months before admission revealed a solitary nodule in the right lower lobe. Mild fibrosis showing subpleural honeycombing was observed in the same area