Light and Electron Microscopy Comparison of Other Abnormal Humoral Cells

Lymphoma is a malignant tumor originated from lymphohematopoietic system, which mainly manifests as painless enlarged lymph nodes, and enlarged liver and spleen, and all tissues and organs of the whole body can be involved, accompanied by systemic symptoms such as fever, night sweating, emaciation, itching, etc. Lymphoma of the chest is very easy to metastasize and grow in the chest cavity, especially close to the pleura. Since the thymus gland is located in the upper part of mediastinum behind the sternal stalk and it is an important developing and maturing organ of the lymphatic system, the lymphoma in the chest is very easy to be metastasized and implanted in the thoracic cavity, especially the tumors of tissues and organs close to the pleura. It is very common to find lymphoma cells in pleural fluid, and rapidly progressive and aggressive lymphomas are particularly common. Acute lymphoblastic leukemia is a tumor of precursor lymphocytes (lymphoblasts), with a predominance of invasion of the bone marrow and peripheral blood (usually more than 25%) and usually also of the lymph nodes. Abnormal lymphocytes can be seen in pleural fluid, ascites, and cerebrospinal fluid. After treatment, many residual abnormal lymphocytes often hide in these cavities that are not easily penetrated by medications, resulting in recurrence and metastasis of the tumor.