Cytopathology Challenge! Weekly Cases April 17, 2009
1 FNA of abdominal mass: Colorectal adenocarcinoma Prostatic adenocarcinoma Lymphoma Abscess Sarcoma lymphoglandular bodies 1
2 Cervical LN FNA: papillary thyroid ca lymphoma multiple myeloma reactive LN HSV Intranuclear pseudoinclusion. 2
3 CSF from child: Unremarkable HSV CMV PNET Candida Small round blue cells with molding. 3
4 Liver FNA: Benign hepatocytes Benign ductal cells Metastatic small cell carcinoma Metastatic adenocarcinoma Ecchinococcal cyst Metastatic colorectal adenocarcinoma key features: Columnar cells arranged in linear strips. Often with necrotic background. Hepatocytes 4
5 Pleural fluid: mesothelial cells empyema small cell carcinoma squamous cell carcinoma adenocarcinoma “windows” 5
6 Pancreas FNA: normal pancreas pseudocyst adenocarcinoma endocrine neoplasm lymphoma 6
7 ThinPrep pap: Benign endometrial cells Follicular cervicitis HSIL LSIL Adenocarcinoma 7
ThinPrep pap: NILM Reactive cellular changes HSIL AGUS LSIL 8
9 ThinPrep pap: NILM Reactive cellular changes HSIL AGUS LSIL Trichomonas “Trich” halo; reactive phenomenon 9
10 ThinPrep pap: NILM RCC HSIL AGUS LSIL Cavitations in LSIL are larger than Trich halos and have a dark outer edge. 10