JONATHAN ASHTON / SCIENCE PHOTO LIBRARY JONATHAN ASHTON / SCIENCE PHOTO LIBRARY
Hurthle cell tumour. Light micrograph cross- section through a Hurthle cell tumour in a thyroid gland. The Hurthle cells are large and each has a large, dark nucleus. Hurthle cell tumours are be- nign but can be difficult to distinguish from cancerous tumours. Tumours are growths caused by the abnormal multiplication of cells. Benign tumours grow more slowly than cancers and do not spread to other parts of the body. However, the pressure exerted by the expanding tumour may damage surrounding tissue. Haemotoxylin and eosin stained sample. Magnification: x63 at 35mm size.
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