Summary and conclusions Four patients are described who developed granulomatous reactions in the red portions of their tattoos. Histopathological and immunofluoreseence studies showed features of lichen planus. Mercury was identified in only one patient's lesion, and hypersensitivity to mercury was shown by patch testing in one other patient.Tattooing may provide a localised antigenic challenge resulting in spontaneously occurring lichen planus. IntroductionTattoos occasionally have intriguing and even disastrous consequences in addition to remorse. Fortunately most complications of tattoos are rare, but of the complications that do occur a granulomatous response in the red portion is the most common.

Summary Twenty‐three cases of glomus tumours seen at the Dermatology out‐patients of two hospitals are reported. Their principal clinical and histopathological features are recorded and the recent literature reviewed. The findings are compared with previously published accounts.

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Seventy-eight cases of pilomatricoma are reported. The unexpected findings are new lesions occurring in middle and old age; the lack of association with other diseases; and the large number of lesions located deep in the skin. As contemporary knowledge of the nature of this disorder is advancing, it is suggested that the eponymous title be abandoned.