Korean J Pathol.  2009 Oct;43(5):489-493. 10.4132/KoreanJPathol.2009.43.5.489.

Cytology of Plasmacytoid Type Myoepithelioma: Report of Two Cases

• Kim NR
• Cho HY
• Ha SY

• KMID: 1472632
• DOI: http://doi.org/10.4132/KoreanJPathol.2009.43.5.489

Abstract

Myoepithelioma is a rare benign tumor of salivary gland myoepithelial cells, most commonly as a spindle subtype. Here, we present two cases of fine needle aspiration cytology of plasmacytoid myoepithelioma arising from a parotid gland and a hard palate. Aspirates showed plasmacytoid cells with pink-staining, homogeneous, abundant eosinophilic cytoplasm eccentrically displacing the nucleus in cohesive and dissociated forms. Rarely, nuclear grooves and intranuclear cytoplasmic inclusions were evident. These unfamiliar cytologic findings of uncommon myoepithelioma often cause diagnostic difficulties in preoperative aspiration cytology. Recognition of those rare findings provides a reliable diagnostic clue.

Keyword

Myoepithelioma; Biopsy, fine needle; Cytology; Salivary gland neoplasms

MeSH Terms

Biopsy, Fine-Needle
Cytoplasm
Eosinophils
Inclusion Bodies
Myoepithelioma
Palate, Hard
Parotid Gland
Salivary Gland Neoplasms
Salivary Glands