Hyperplastic sebaceous glands (sebaceous hyperplasia) on the forehead. A yellow-white nodule is seen inside the skin especially when the skin is slightly stretched; the nodules are often arranged in a cluster with a hollow in the centre. Besides forehead and nose, these are also seen in the mouth, on the mammary areolae and in the genitals. They are very common in organ transplant patients. The lesions are benign but may sometimes raise suspicion of e.g. a basalioma.