A foamable pharmaceutical composition and a method of treating corticosteroid-responsive dermatoses of the skin are disclosed. The latch assembly utilizes a locking cylinder as a push-button mechanism in order to release at least a portion of the handle, which then pivots to an extended position where it can be grasped and turned by an operator. This expanded profile anchors the assembly into the tissue or bone by a changing of position of elements of the assembly relative to other assembly elements. The press mechanism works to press the electrode bars welded to a housing retained by a housing holder against a first die. Monitoring of the state of polarization occurs before and after a time period chosen to be less than a time during which the state of polarization of the optical fiber is expected to drift.