There is a longstanding Hair Loss classification system called the Norwood-Hamilton scale. I have looked hard and long at this and none of these descriptions seem to cover the Island of Hair. Number 4 is close but is coupled with the "monk" patch at the back. Number 5 shows a tiny Island drifting but has a saddle of hair.
The Island need documenting as it is a devastating phenomena of male baldness. It's like the Ebola Virus of hair... by the time you notice someone is a suffer it's already to late!
To follow IOH no.3 Wayne Rooney.