Necrobiotic xanthogranuloma occurring within linear morphoea.

SUMMARY A 32-year-old woman with linear morphoea of her left arm was noted to have a yellowish atrophic plaque within the linear morphoea. Review of photographs taken on her first visit 3 years previously revealed that the lesion had been present and had increased in size over the 3 years. Necrobiotic xanthogranuloma (NXG) was diagnosed on biopsy. Paraproteinaemia was not detected. The NXG was surgically excised and it has not recurred in 12 months of follow up.