Fig. 3From: Atypical ultrasound features of parathyroid tumours may bear a relationship to their clinical and biochemical presentationa Neck ultrasonography of a 62-year-old female patient showed an isoechoic left superior parathyroid lesion. Note that it is difficult to perceive an echogenic rim around the lesion. b Low-power photomicrograph (×50, H&E stain) shows a parathyroid adenoma composed of nests of polyhedral cells with extensive fat deposition (*) and cystic haemorrhagic degeneration (short arrow)Back to article page