"The sign is named after Leland G Hawkins (1933-1991) 5, an American orthopaedic surgeon. He also established the Hawkins classification of talar neck fractures which helps to assess the risk of osteonecrosis of the talar dome."
"The Hawkins sign describes subchondral lucency of the talar dome seen in AP view that occurs secondary to subchondral atrophy 6-8 weeks after a talar neck fracture 1."