FNA supraclavicular node: squamous cell carcinoma of the lung


Drs. Prolla and Diehl's INTERESTING CASE OF THE MONTH February 2002 case A

200x M-G-G staining, many keratinized cells, and necrotic debris

500x M-G-G staining, large tadpole cell

200x Papanicolaou staining, many fiberlike keratinized cells, and necrotic debris

500x Papanicolaou  staining, highly keratinized cells and some ``ghost cells`“




The smears show many fiberlike squamous cells, and others with bizarre shapes (v.g. a tadpole cell), and ghost keratinized cells. There are also many necrotic debris. This is typical of squamous cell carcinoma. A biopsy was diagnostic, and confirmed the cytological findings.



Features of Squamous cell carcinoma

Cellular patterns:
Sheet-like groups of keratinized cells, with distinct cellular borders
Many isolated fiber-like or tadpole cells
Many bizarre-shaped cells
Cytoplasm:
The keratinized cells have orangeophilic/eosinophilic glassy cytoplasm in Papanicolaou staining
In Romanowsky staining they have pale blue or clear cytoplasm
Nucleus
Hyperchromatic, with angular shape
Large nucleoli in non-keratinized cells
Mitoses, karyorrhexis and necrotic debris are frequent
Tumor diathesis





See also Case B




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