Still's disease and haemophagocytic syndrome.

SIR, A double-contrast arthrographic technique was used in the first six frozen shoulder patients studied, but no advantage was found over the single-contrast technique, and the latter technique was used in the remaining patients. These details were unfortunately omitted from the final draft of the paper. However, the procedures were performed under x-ray control, and adequate joint outline was obtained with both methods. There was no difference in the rate or extent of recovery of pain or range of passive movement and no difference in the frequency or severity of side effects with either technique. We therefore stand by our observation which is, as Wright and Haq' suggested, that arthrographic features are not consistent in patients with painful stiff shoulders.