Cat scratch disease

An error occurred in this Lesson of the Week by Alexander Williams and colleagues (18 May, pp 1199-200). The third paragraph gives the impression that the histopathological diagnosis was sarcoidosis. This is wrong; this was the diagnosis suggested in the referral letter from the surgeon. In fact, the histopathologist had suggested cat scratch disease in his differential diagnosis. Also, in the same paragraph, the third sentence should read: “Culture of the lymph node was not undertaken [not “Cultures were Gram negative”].”