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Low Grade Carcinoma Ex-Pleomorphic Adenoma: Diagnosis and Diagnostic Challenges Caused by Fine Needle Aspiration: Report of Three Cases and Review of Literature.
Covinsky, Michael; Cai, Zhenjian; Ambelil, Manju; Liu, Jing; Zhu, Hui.
Afiliación
  • Covinsky M; Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
  • Cai Z; Department of Pathology and Laboratory Medicine, Icahn School of Medicine at Mount Sinai, 1468 Madison Avenue, New York, NY, 10029, USA.
  • Ambelil M; Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
  • Liu J; Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA.
  • Zhu H; Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX, 77030, USA. hui.zhu@uth.tmc.edu.
Head Neck Pathol ; 12(1): 82-88, 2018 Mar.
Article en En | MEDLINE | ID: mdl-28589437
Low grade carcinoma ex pleomorphic adenoma (LG CXPA) is a rare low grade malignant neoplasm arising from preexisting pleomorphic adenoma (PA). LG CXPA demonstrates no overt cytological atypia, and can be difficult to distinguish from cellular PA. Invasive growth is one of the hallmarks of LG CXPA, e.g., tumor extends beyond the capsule and into adjacent non-neoplastic tissue. However, it is known that capsular and vascular invasion, as well as the presence of stroma-rich PA in soft tissue without a capsule (pseudopodia) can be seen in PA. These histological findings have no prognostic significance and are not diagnostic of malignancy. In addition, recurrent PA typically presents as numerous nodules extending into soft tissue and skeletal muscle, which again are not considered malignant features. Thus, "infiltrative growth" of LG CXPA is difficult to define and diagnosis is challenging to many practicing pathologists. In this study, we report three cases of LG CXPA. We review the diagnostic criteria for LG CXPA, and discuss the diagnostic challenges caused by fine needle aspiration (FNA) changes. FNA is widely used as a cost-effective, quick and accurate method for diagnosing salivary gland lesions. Histological changes post-FNA are usually focal and mild, and are not causes of diagnostic difficulties. According to our knowledge, this is the first report of LG CXPA complicated with FNA changes.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neoplasias de la Parótida / Carcinoma / Artefactos / Biopsia con Aguja Fina Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Female / Humans / Male / Middle aged Idioma: En Revista: Head Neck Pathol Asunto de la revista: NEOPLASIAS / PATOLOGIA Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neoplasias de la Parótida / Carcinoma / Artefactos / Biopsia con Aguja Fina Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Female / Humans / Male / Middle aged Idioma: En Revista: Head Neck Pathol Asunto de la revista: NEOPLASIAS / PATOLOGIA Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos