Extracapsular Dissection of Pleomorphic Adenoma of the Parotid Gland Through Minimal Preauricular and Retroauricular Incisions in Children

AbstractThere is continued controversy over the extent of parotidectomy required for removal of a benign pleomorphic adenoma from the parotid gland. Currently, consensus exists that the integrity of the facial nerve must be preserved when the tumour is totally removed.As a result of experience gained in the first half of the twentieth century, it was recommended that superficial parotidectomy with facial nerve dissection should be the minimal biopsy for pleomorphic adenoma. Since that time, however, research has indicated that partial parotidectomy or extracapsular dissection of benign pleomorphic adenoma can be accomplished with preservation of the facial nerve without an increase in tumour recurrence. Partial parotidectomy or extracapsular dissection results in impaired cosmetic results and a lower incidence of Frey's syndrome, and thus may be the preferred approach when undertaken by experienced surgeons.

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An update on extracapsular dissection for the management of parotid gland pleomorphic adenoma

Journal of Oral Pathology and Medicine ◽

10.1111/jop.13251 ◽

2021 ◽

Author(s):

Wee Lee Loke ◽

Siavash Rahimi ◽

Peter A. Brennan

Keyword(s):

Parotid Gland ◽

Pleomorphic Adenoma ◽

Extracapsular Dissection

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Retrograde Facial Nerve Dissection Using Zygomatic Branch as Landmark in Parotid Gland Surgery for Pleomorphic Adenoma: A 4 Year Prospective Study of 40 Cases

Annals of International medical and Dental Research ◽

10.21276/aimdr.2018.4.3.sg5 ◽

2018 ◽

Vol 4 (3) ◽

Author(s):

Jayanth Kumar Biswal ◽

Jino Sebastian

Keyword(s):

Parotid Gland ◽

Facial Nerve ◽

Prospective Study ◽

Pleomorphic Adenoma

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Co-expression of Myoepithelial and Melanocytic Features in Carcinoma Ex Pleomorphic Adenoma

Head and Neck Pathology ◽

10.1007/s12105-021-01299-4 ◽

2021 ◽

Author(s):

Costantino Ricci ◽

Federico Chiarucci ◽

Francesca Ambrosi ◽

Tiziana Balbi ◽

Barbara Corti ◽

...

Keyword(s):

Differential Diagnosis ◽

Salivary Gland ◽

Parotid Gland ◽

Pleomorphic Adenoma ◽

Salivary Gland Tumors ◽

Melanin Pigment ◽

Carcinoma Ex Pleomorphic Adenoma ◽

Pertinent Literature

AbstractThe presence of melanin pigment and melanocytic markers expression have been rarely reported in salivary gland tumors. Herein, two cases of carcinoma arising in pleomorphic adenoma of the parotid gland and showing diffuse expression of myoepithelial and melanocytic markers are described. The clinical-pathological clues useful in the differential diagnosis with melanoma are discussed. In addition, a review of the pertinent literature is also proposed, discussing the pathologic mechanisms potentially involved in this phenomenon.

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Giant Cell Carcinosarcoma of the Parotid Gland With a PLAG 1 Translocation in Association With a Pleomorphic Adenoma With HMGA2 Translocation

American Journal of Clinical Pathology ◽

10.1093/ajcp/aqaa104 ◽

2020 ◽

Vol 154 (6) ◽

pp. 811-815

Author(s):

Levon Katsakhyan ◽

Virginia A LiVolsi ◽

Ara A Chalian ◽

Paul J Zhang

Keyword(s):

Salivary Gland ◽

In Situ Hybridization ◽

Parotid Gland ◽

Giant Cell ◽

Pleomorphic Adenoma ◽

De Novo ◽

Sarcomatous Component ◽

Gland Tumor ◽

Parotid Gland Tumor

Abstract Objectives Carcinosarcomas of the salivary gland are rare neoplasms and have been described arising de novo or in association with pleomorphic adenoma (PA). PLAG1 and HMGA2 translocations are known to occur in PAs and carcinomas ex PA but are mutually exclusive. Methods We report a case of a carcinosarcoma in the parotid gland of a 77-year-old man with unusual anaplastic sarcomatoid giant cell morphology. Results Microscopically, a small separate PA was found adjacent to the carcinosarcoma. By conventional notion, the PA and carcinosarcoma would be considered related, as carcinosarcomas are well known to arise from PAs (carcinosarcoma ex PA). However, fluorescence in situ hybridization (FISH) assay demonstrated PLAG1 translocation in the carcinosarcoma and HMGA2 translocation in the separate PA. Conclusions These findings support that the carcinosarcoma likely originated from another PA with a PLAG1 translocation or de novo but not from the coexisting PA harboring a different translocation. To our knowledge, the case is the first to demonstrate PLAG1 translocation by FISH in a sarcomatous component of any parotid gland tumor, which may help better classify these tumors. In addition, multiple PAs are commonly found in the salivary gland, and to our knowledge, our case is the first to demonstrate that the same parotid gland can host PAs and PA-related tumors with different translocations.

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