Abstract
Introduction: the diagnosis of papillary-cystic variant of acinic-cell carcinoma (Acc-PcV) is easy on histology. However, the diagnosis on cytology usually poses a problem because of the cytoarchitecture which is different from classic type. case report: A 39-year-old male presented with left parotid swelling for last four months. Fine needle aspiration cytological smears revealed papillary fragments and tumor cells with varied morphological features. cell block prepared from the fluid aspirates confirmed the diagnosis of papillary-cystic variant of aciniccell carcinoma. Histological study of the excised specimen confirmed the diagnosis of acinic cell carcinoma, papillary cystic variant. conclusion: this case describes papillary-cystic variant of acinic-cell carcinoma and discusses the myriad of cytological features exhibited by it.
Highlights
IntroductionAcinic cell carcinoma is an uncommon low grade tumor of the salivary glands that constitutes 2.5–4% of parotid gland tumors
The diagnosis of papillary-cystic variant of acinic-cell carcinoma (ACC-PCV) is easy on histology
The diagnosis on cytology usually poses a problem because of the cytoarchitecture which is different from classic type as it shows prominent papillary architecture with more cohesive cells and change in morphology of tumor cells due to suspension in cystic fluid
Summary
Acinic cell carcinoma is an uncommon low grade tumor of the salivary glands that constitutes 2.5–4% of parotid gland tumors. Papillary-cystic variant of aciniccell carcinoma (ACC-PCV) is histologically composed of tumor with papillary and cystic growth patterns, with varying proportions of one or more cell types. The diagnosis on cytology usually poses a problem because of the cytoarchitecture which is different from classic type as it shows prominent papillary architecture with more cohesive cells and change in morphology of tumor cells due to suspension in cystic fluid. This report describes the detailed cytological features on fine needle aspiration cytology (FNAC) and the use of cell block preparation from the cyst fluid aiding in the diagnosis of this special variant. Cell block stained with H&E revealed microcystic and papillary cystic pattern of acinic-cell carcinoma (Figure 3A). A diagnosis of papillary cystic variant of ACC was confirmed on histology (Figure 3B)
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