Keratin Cysts in Phalangeal Bones

Intraosseous Epidermoid Cyst of Distal Phalanx of Fingers

“…In 1968, Lerner and Southwick [1] reported that the intraosseous epidermoid cysts were twice as common in men as in women whose ages range between 8 and 83 years, and they tended to be concentrated in adults between the ages of 25 and 50 years-most common especially in actively working people. In 1970, Schajowicz et al [4] cited that men are predominated and that the age of onset of the disease was between 19 and 54 years.…”

“…The left hand has a higher incidence of cysts than the right with the left middle finger being the most common site. The thumb, index, and ring finger are the next most common sites [1,2]. Additional sites of involvement include phalanges of toes and large toe, ulna, femur, tibia, sternum, and amputation stumps [1,[3][4][5].…”

“…The thumb, index, and ring finger are the next most common sites [1,2]. Additional sites of involvement include phalanges of toes and large toe, ulna, femur, tibia, sternum, and amputation stumps [1,[3][4][5]. The symptoms comprise an increase in finger size with, or without pain and tenderness, redness, and curving of the nail.…”

“…The symptoms comprise an increase in finger size with, or without pain and tenderness, redness, and curving of the nail. The interval between the trauma and the appearance of symptoms varies from weeks to years [1,2,4].…”

“…Intraosseous epidermoid cysts arise most frequently in the skull and the distal phalanges of the hand [1][2][3]. It is very difficult to diagnose them correctly before surgery according to clinical and radiographic findings.…”