Precocious puberty in a boy with hCG secreting tumour in the pituitary gland

We present a rare case of germinoma initially presenting with features of cranial diabetes insipidus, which responded to treatment with intranasal DDAVP. Thirteen months later the patient re-presented with signs of precocious puberty due to ectopic hCG secretion by the tumour. This is an unusual presentation of a rare tumour in children