可见非典型淋巴细胞，之所以称为非典型，是因为体积更大（更多的细胞质）并可见核仁。
细胞质因RBC挤压而成锯齿形。多见于感染性单核细胞增多症。
The WBC's seen here are "atypical" lymphocytes. They are atypical because they are larger (more cytoplasm) and have nucleoli in their nuclei. The cytoplasm tends to be indented by surrounding RBC's. Such atypical lymphocytes are often associated with infectious mononucleosis.
