Nasopharyngeal carcinoma complicated by pseudohypertrophic osteoarthropathy.

This paper describes a case of nasopharyngeal carcinoma complicated by pseudohypertrophic osteoarthropathy due to pulmonary metastasis following radiotherapy. A similar clinical picture may be seen in pseudohypertrophic osteoarthropathy, rheumatoid arthritis and carcinomatous arthritis. It is important clinically to differentiate them from one another. One should search carefully for an intrathoracic secondary lesion when pseudohypertrophic osteoarthropathy occurs in a case of nasopharyngeal carcinoma following radiotherapy.