Puberty should be left to run its course and in most children this is correct. However, in very rare cases, the breast growth rate in a young girl can be extreme. At age 9/10 my daughter had small breast buds, which was to be expected. Unfortunately, her breasts continued to grow rapidly and at 11 she was a size 32 K and diagnosed with juvenile gigantomastia. It is a shocking disease and as a result I have written a memoir, which I would like published, in the hope to raise awareness. I would be interested to hear from anyone who has experienced this.