Vaginal bleeding in a young girl due to primary hypothyroidism.

When vaginal bleeding occurs in young girls, it is always of clinical importance. The diagnosis should be made with some urgency, so that an appropriate therapy will be given in time. We present a rare case of a 6-year-old girl with primary hypothyroidism, who presented with a history of cyclical vaginal bleeding and precocious puberty while her bone age was delayed. Thyroxine therapy was commenced soon after diagnosis, the bleeding consequently stopped and there was no recurrence after six-month of follow-up.