The prevalence of wrist ganglia in an asymptomatic population: magnetic resonance evaluation.

Magnetic resonance imaging (MRI) was performed on the wrists of 103 asymptomatic volunteers. The images were evaluated independently by two musculoskeletal radiologists and one orthopaedic surgeon. Wrist ganglia were identified in 53 out of the 103 wrists. The average long and short axes measurements were 8 mm (range 3-22) and 3 mm (range 2-10), respectively. Seventy per cent of the ganglia originated from the palmar capsule in the region of the interval between the radioscaphocapitate ligament and the long radiolunate ligament. Fourteen per cent of the ganglia were dorsal and originated from the dorsal, distal fibres of the scapholunate ligament. Two ganglia had surrounding soft tissue oedema and one had an associated intraosseous component. Unlike previous surgical and pathological series, our study showed that palmar wrist ganglia are more common than dorsal wrist ganglia. The vast majority of these asymptomatic ganglia occur without associated ligamentous disruption, soft tissue oedema or intraosseous communication.

Acute staphylococcal osteomyelitis of the clavicle.

Osteomyelitis of the clavicle is a rare condition that is difficult to diagnose. We have reviewed five cases of acute staphylococcal osteomyelitis of the clavicle that have been collected over a 3-year period in our center. All patients had pain, fever, and swelling over the clavicle. All had a raised erythrocyte sedimentation rate with positive Staphylococcus aureus blood cultures at presentation. Three of our five patients required surgical drainage. Two of these patients had pathologic fracture of the clavicle while receiving treatment and then went on to develop complete resorption of the medial clavicle. Isolated reports of acute staphylococcal osteomyelitis of the clavicle in children occur in the literature. This behaves very differently from chronic sclerosing osteomyelitis and tuberculous osteomyelitis of the clavicle, which are more commonly reported. Our impression is that early treatment with high-dose intravenous antistaphylococcal antibiotics helps avoid the complication of pathologic fracture. The functional result after resorption of the medial clavicle is very good in the short term.