The answer you are looking for is "King Tutankhamun", but given the way the question is phrased, the answer would be King Fuad I of Egypt, although he was not a teenager.
Howard Carter, a British Egyptologist discovered the tomb of the teenage Pharaoh Tutankhamun in 1922. It was unique in that it was the first Egyptian Pharaoh's tomb that remained untouched from burial to the modern age. In all prior cases, a Tomb Raider had broken in before and stolen the historical artifacts. However, because Howard Carter was the first person to discover the tomb, all of the artifacts could be collected, examined, and displayed as Egyptian national treasures.
As for Fuad I, he was Sultan of Egypt from 1917-1922 and King of Egypt and the Sudan from 1922-1936. The change in status in 1922 indicates that the British recognized Egyptian independence in that year, not that Fuad's station had really changed. He was 54 years old in 1922.
The only teenage king in Ancient Egypt that I am aware of was King Tutankhamun also known as King Tut.
King Tutankamen
The tomb of Tutankhamen, king of Egypt, was discovered by English archaeologist Howard Carter in 1922.
Howard carter discovered king tut's tomb in 1922 in the valley of the kings, Egypt.
Howard Carter discovered the tomb of King Tutankhamen on that day.
in 1922
On November 4th 1922 in Egypt.
Egypt became de jure independent from the United Kingdom in 1923. However, the King of Egypt was more or less a British puppet. British troops finally departed from Egypt in 1945 and the King Farouk was overthrown in a military coup d'etat in 1954, often called the Officer's Coup. This was when Egypt became truly independent under Gamal Abdel Nasser.
The tomb of the Pharaoh Tutankhamun was discovered on November 4th 1922 in The Valley of the Kings, Egypt. A British archaeologist by the name of Howard Carter discovered the tomb of the boy king.
According to Wikipedia, Howard Carter discovered King Tut's tomb in 1922. Other answers specify Nov. 4, 1922.
In Upper Egypt (South), in the Valley of the Kings - west bank of the Nile, in front of Luqsor - where in 1922 Howard Carter found his grave, KV62
I believe you mean Tutankhamen, or King Tut. His tomb was discovered in Egypt by Howard Carter in 1922, 3,000 years after King Tut died.