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.
Untreated or undertreated Lyme can cause some people to develop severe symptoms that are hard to resolve. This condition may be referred to as post-treatment Lyme disease (PTLD) or chronic Lyme disease (CLD). We donât know exactly how many people who are diagnosed and treated remain ill.