Microscopic study of a pigmented lesion appearing at the site of an incompletely removed balloon cell nevus revealed a combined mole with an active junctional component and without evidence of remaining balloon cells. This behavior lends credence to the theory that the balloon cell is a form of dermal nevus cell, conceivably a precursor.
Lewis BL. Junctional Activity Recurring Over an Incompletely Removed Balloon Cell Nevus. Arch Dermatol. 1971;104(5):513-514. doi:10.1001/archderm.1971.04000230055008