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Radiological changes of short and flat bones in primary hypertrophic osteoarthropathy

Hypertrophic osteoarthropathy (HO) is defined as a syndrome characterised by finger clubbing and periostosis of long bones.1 It is classified into primary (PHO) and secondary hypertrophic osteoarthropathy (SHO).2 

To establish the HO diagnosis, finger clubbing and periostosis of long bones must be present.2 

Cases of PHO have not been frequently reported in the medical literature.3 HO cases have recently been more described, since HO was classified into the bone and cartilage group of diseases according to the international classification of rheumatic diseases.4 

We formed a large group of patients in whom changes of flat bones were found. The analysis was based on a group of patients with PHO from 1970 to 1996. Over 26 years, a total of 76 patients …