New York, June 12 : She''s one of Hollywood’s most hottest stars, but Transformers actress Megan Fox is not entirely perfect – she has unusually large thumbs.

The medical term for Fox’s clubbed thumbs is brachydactyly, according to local hand surgeons, reports The New York Daily News.

"Literally, what it means is short finger," says Dr. Steven Bendner, a hand surgeon at Beth Israel Medical Center.

"The nail of the thumb in this condition is often very short and wide,” the expert added.

"It is usually hereditary. Although it could also have been caused by frostbite, or it could have been an injury to the growth plate in childhood,” the expert explained.

The condition becomes more visible during growth and maturity, Beldner says.

Dr. Richard Kim, director of congenital hand surgery at Hackensack Medical Center, notes: "You need it to be able to touch the other fingers and it is important for pinching. In Megan Fox’s case, it appears that only the last bone of the thumb is affected and that it does not involve the joint. For her, it looks like it’s just a cosmetic deficit." (ANI)