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Serous Fluids (Pleural,

Abnormal Results

Pericardial, and Peritoneal)

Table 20.14

>50% Neutrophils >50% Lymphocytes

Increased reactive lymphs and plasma cells

Malignant cells

<1% Mesothelial

Traumatic Hemorrhage

Malignancy of infarctions

Infections Malignancies Inflammatory conditions Acute inflammatory conditions Infectious processes

Tuberculosis Carcinomas

Lymphoproliferative diseases Multiple myeloma Malignancy and tuberculous effusions

Diagnostically significant if found on the differential Solid tumors and hematology malignancies shed into these types of fluids are caused by metastatic adenocarcinoma Tuberculous effusions

Table 20.14

Color/appearance

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