Fig. 4From: Misdiagnosis of brown tumour caused by primary hyperparathyroidism: a case report with literature reviewUltrasonography and pathological findings. a, b A colour ultrasound-guided puncture biopsy of the proximal left humerus showing a brown spongy material comprising several multinucleated giant cells, without atypia. c, d The diagnosis after the postoperative pathological examination was a malignant fibrous histiocytomaBack to article page