The design, development and documentation of software. See software engineer, systems analysis & design, programming, object-oriented programming, software metrics, CASE and Systemantics.
Overview. Posttransplant lymphoproliferative disease (PTLD) is an unusual entity that has many features of an immune system malignancy. It is characterized by uncontrolled proliferation of lymphoid lineage cells (typically B cells, rarely non-B lineage) in a context of posttransplant immunosuppression.
Percutaneous Achilles Tendon Lengthening. Indications. A Percutaneous TendoAchilles lengthening (PTAL) is a procedure that lengthens the Achilles tendon. This lengthening is needed if the ankle joint has limited motion in an upward direction (for example the person can easily walk on the toes, but not on the heels).