Squamous epithelial cysts in the subcutaneous tissues of the hands have been repeatedly described in the literature.1 It is generally stated that such cysts are of traumatic origin and are due to proliferation of a small fragment of cutaneous epithelium that is carried into the deeper tissues. Wörz,2 however, reviewed a series of fifty-five cases and was able to find in only twenty-four of them an adequate history of trauma.
That such epithelial cysts not only occur in the soft tissues but may also extensively involve the phalanges is shown by reports in the literature, summarized in the accompanying table.
To this series may be added the following two cases:
A girl, whose age is not given, caught her finger in a door in 1917; seven years later, in 1924, the finger presented a swelling of the terminal phalanx. A roentgenogram (fig. 1 A
BISSELL AD, BRUNSCHWIG A. SQUAMOUS EPITHELIAL BONE CYSTS OF THE TERMINAL PHALANXAND BENIGN SUBUNGUAL SQUAMOUS EPITHELIAL TUMOR OF THE FINGER. JAMA. 1937;108(20):1702–1704. doi:10.1001/jama.1937.02780200024006