Findings

The nucleated cell is an "atypical"/"activated" lymphocyte. It is a very large cell, with large amounts of cytoplasm, moderately dark blue-gray in color; irregular nucleus with smudgy chromatin resembling that of lymphocytes but also that of monocytes.

Impression

Infectious mononucleosis

Clinical Pathologic Correlation
(See slide 3.)

Preparation

Fixed, Wright’s stain

View

High-power light micrograph

Specimen

Blood smear

Image Credit

Stephen Baird, M.D.
Department of Pathology
School of Medicine
University of California, San Diego

Mehran Goulian, M.D.
Department of Pathology
School of Medicine
University of California, San Diego