Help me code for diagnosis year :
PTLD is a lymphoid proliferation arising in a recipient of a solid organ transplant, allogenic bone marrow transplantation, or an umbilical cord blood transfusion. The patient must have a history of a solid organ transplant or an allogenic bone marrow transplant. The polymorphic PTLD is actually caused by the post-transplant T-cell immunosuppressant drugs. Most cases of polymorphic PTLD occur within a year of transplantation; however, they can occur anytime after the transplant.
There are two types of PTLD:
1. Monomorphic - PTLD with an accompanying B-cell lymphoma, T-cell lymphoma, classical Hodgkin lymphoma, or plasmacytoma. When both a PTLD and lymphoma or plasmacytoma occur, the histology is coded to the lymphoma or plasmacytoma. Treatment is given for the lymphoma or plasmacytoma. See Rule M14 and PH1 in the Hematopoietic manual.
2. Polymorphic: PTLD with no accompanying lymphoma or plasmacytoma. In solid organ recipients, the CNS may be the only site of involvement or may be associated with multi-organ involvement.
Treatment for the polymorphic PTLD is the decrease or cessation of immunosuppressant drugs. This commonly leads to a regression or complete absence of the PTLD.