Hematopoietic and lymphoid system diseases
Song wenjing The department of pathology
Review
Hematopoietic and lymphoid tissues include: Myeloid tissue: marrow and hematopoietic cells. Lymphoid tissue: thymus, spleen, lymph node and the other scatted lymphoid tissues.
IV
Extensive involvement of extranodal sites, with or without lymph node involvement
Quality changes:malignant tumor
These diseases don’t confine to a single anatomic site.
eg: lymph node lymphoma →marrow, blood (lymphocytic leukemia). →liver, spleen.
The normal lymph node
The normal lymph node
Lymph folicules
Introduction
These diseases involved:
Quantity changes: ↓:anemia, leucopenia, thrombocytopenia; ↑:leucocytosis (reactive), thrombocytosis
Recently, the incidence↑.