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Rooper LM. From Malignant Thyroid Teratoma to Thyroblastoma: Evolution of a Newly-recognized DICER1 -associated Malignancy. Adv Anat Pathol 2023; 30:136-145. [PMID: 36069850 DOI: 10.1097/pap.0000000000000364] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Thyroblastoma is a novel thyroid malignancy included in the 5th Edition WHO Classification of Endocrine and Neuroendocrine Tumours. The majority of tumors now classified as thyroblastoma were originally regarded to be malignant thyroid teratomas. However, these neoplasms were recently recognized as a separate entity based on a distinctive constellation of primitive multilineage elements, including immature thyroid epithelium, undifferentiated or rhabdomyoblastic spindle cell proliferations, and neuroepithelial blastema, as well as recurrent DICER1 hotspot mutations. Thyroblastoma is an aggressive tumor that leads to death from disease in ~50% of patients, making it essential to differentiate this entity from a wide range of other thyroid tumors that show overlapping histologic features or DICER1 mutations. This review aims to provide a practical overview of the background, clinicopathologic features, molecular underpinnings, and differential diagnosis of this recently-described and molecularly-defined entity.
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Affiliation(s)
- Lisa M Rooper
- Departments of Pathology and Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD
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2
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López F, Al Ghuzlan A, Zafereo M, Vander Poorten V, Robbins KT, Hamoir M, Nixon IJ, Tufano RP, Randolph G, Pace-Asciak P, Angelos P, Coca-Pelaz A, Khafif A, Ronen O, Rodrigo JP, Sanabria Á, Palme CE, Mäkitie AA, Kowalski LP, Rinaldo A, Ferlito A. Neck Surgery for Non-Well Differentiated Thyroid Malignancies: Variations in Strategy According to Histopathology. Cancers (Basel) 2023; 15:cancers15041255. [PMID: 36831604 PMCID: PMC9954150 DOI: 10.3390/cancers15041255] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/04/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Lymph node metastases in non-well differentiated thyroid cancer (non-WDTC) are common, both in the central compartment (levels VI and VII) and in the lateral neck (Levels II to V). Nodal metastases negatively affect prognosis and should be treated to maximize locoregional control while minimizing morbidity. In non-WDTC, the rate of nodal involvement is variable and depends on the histology of the tumor. For medullary thyroid carcinomas, poorly differentiated thyroid carcinomas, and anaplastic thyroid carcinomas, the high frequency of lymph node metastases makes central compartment dissection generally necessary. In mucoepidermoid carcinomas, malignant peripheral nerve sheath tumors, sarcomas, and malignant thyroid teratomas or thyroblastomas, central compartment dissection is less often necessary, as clinical lymphnode involvement is less common. We aim to summarize the medical literature and the opinions of several experts from different parts of the world on the current philosophy for managing the neck in less common types of thyroid cancer.
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Affiliation(s)
- Fernando López
- Head and Neck Surgery, Hospital Universitario Central de Asturias (HUCA), 33011 Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias, University of Oviedo, CIBERONC, 330011 Oviedo, Spain
- Correspondence: ; Tel.: +34-985108000
| | - Abir Al Ghuzlan
- Department of Biology and Pathology, Gustave Roussy Cancer Campus, University Paris-Saclay, 91190 Villejuif, France
| | - Mark Zafereo
- Department of Head and Neck Surgery, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Vincent Vander Poorten
- Otorhinolaryngology Head and Neck Surgery and Department of Oncology, Section Head and Neck Oncology, University Hospitals Leuven, 3000 Leuven, Belgium
- European Reference Network for Rare Adult Solid Cancers (EURACAN), 69008 Lyon, France
| | - K. Thomas Robbins
- Department of Otolaryngology-Head and Neck Surgery, Southern Illinois University School of Medicine, Springfield, IL 62702, USA
| | - Marc Hamoir
- Department of Head and Neck Surgery, UC Louvain, St Luc University Hospital and King Albert II Cancer Institute, 1200 Brussels, Belgium
| | - Iain J. Nixon
- Department of Otorhinolaryngology Head and Neck Surgery, NHS Lothian, Edinburgh EH1 3EG, UK
| | - Ralph P. Tufano
- FPG Thyroid and Parathyroid Center, Division of Head and Neck Endocrine Surgery, The Sarasota Memorial Health Care System, Sarasota, FL 34239, USA
| | - Gregory Randolph
- Division of Otolaryngology-Endocrine Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Harvard University, Boston, MA 02138, USA
| | - Pia Pace-Asciak
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON M5S, Canada
| | - Peter Angelos
- Department of Surgery and MacLean Center for Clinical Medical Ethics, The University of Chicago, Chicago, IL 60637, USA
| | - Andrés Coca-Pelaz
- Head and Neck Surgery, Hospital Universitario Central de Asturias (HUCA), 33011 Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias, University of Oviedo, CIBERONC, 330011 Oviedo, Spain
| | - Avi Khafif
- A.R.M. Center of Otolaryngology-Head and Neck Surgery, Assuta Medical Center, Affiliated with Ben-Gurion University of the Negev, Tel Aviv 8410501, Israel
| | - Ohad Ronen
- Department of Otolaryngology—Head and Neck Surgery, Galilee Medical Center, Affiliated with Azrieli Faculty of Medicine, Bar Ilan University, Safed 5290002, Israel
| | - Juan Pablo Rodrigo
- Head and Neck Surgery, Hospital Universitario Central de Asturias (HUCA), 33011 Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias, University of Oviedo, CIBERONC, 330011 Oviedo, Spain
| | - Álvaro Sanabria
- Department of Surgery, Universidad de Antioquia, CEXCA Centro de Excelencia en Enfermedades de Cabeza y Cuello, Medellín 050021, Colombia
| | - Carsten E. Palme
- Department of Head and Neck Surgery, Sydney Head and Neck Cancer Institute, Chris O’Brien Lifehouse, Sydney, NSW 2050, Australia
- Faculty of Medicine and Health Sciences, Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
- Royal Prince Alfred Institute of Academic Surgery, Sydney Local Health District, Sydney, NSW 2050, Australia
| | - Antti A. Mäkitie
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, FI-00029 Helsinki, Finland
| | - Luiz P. Kowalski
- Department of Head and Neck Surgery, University of Sao Paulo Medical School, Sao Paulo 01246-903, Brazil
- Department of Head and Neck Surgery and Otorhinolaryngology, AC Camargo Cancer Center, Sao Paulo 01509-001, Brazil
| | | | - Alfio Ferlito
- Coordinator of International Head and Neck Scientific Group, 35125 Padua, Italy
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3
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Zhang L, Lubin D, Sinard JH, Dickson BC, Antonescu CR, Wu H, Panni RZ, Dogan S, Untch BR, Ghossein RA, Xu B. Primary Mesenchymal Tumors of the Thyroid Gland: A Modern Retrospective Cohort Including the First Case of TFE3-Translocated Malignant Perivascular Epithelioid Cell Tumor (PEComa). Head Neck Pathol 2022; 16:716-727. [PMID: 35218514 PMCID: PMC9424363 DOI: 10.1007/s12105-022-01428-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/06/2022] [Indexed: 12/19/2022]
Abstract
Primary mesenchymal tumors of the thyroid gland are extremely rare, with only case reports and small case series documented in the English literature, many of which were published prior to the era of molecular pathology. In the current study, we aim to present a contemporary multi-centric cohort of thyroid mesenchymal tumors. Nineteen primary thyroid mesenchymal tumors were collected from three tertiary centers. Their clinicopathologic features, immunoprofile, molecular alterations, and outcome were described. Eight cases were classified as benign or intermediate with solitary fibrous tumor being the most common histotype (n = 3). The remaining 11 cases were malignant, including three angiosarcomas, one epithelioid hemangioendothelioma, one adamantinoma-like Ewing sarcoma, one biphasic synovial sarcoma, one malignant melanocytic peripheral nerve sheath tumor (melanotic schwannoma), one myxofibrosarcoma, and two undifferentiated pleomorphic/spindle sarcomas (one of which was radiation-induced). Six tumors showed characteristic diagnostic translocations. We herein also described the first case of thyroid malignant perivascular epithelioid cell tumor (PEComa) with RBM10-TFE3 fusion in a 35-year-old female patient. Thyroid mesenchymal tumors, benign or malignant, are rare with a broad spectrum of possible diagnoses. A comprehensive examination to include histology, immunohistochemistry, and molecular testing is essential for the correct diagnosis and to distinguish them from anaplastic thyroid carcinoma. PEComa may occur as a primary tumor of the thyroid gland, expanding the histologic spectrum of thyroid mesenchymal tumors.
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Affiliation(s)
- Lingxin Zhang
- Department of Pathology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - Daniel Lubin
- Department of Pathology and Laboratory Medicine, School of Medicine, Emory University, Atlanta, GA, USA
| | - John H Sinard
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Brendan C Dickson
- Department of Pathology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - Cristina R Antonescu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Hao Wu
- Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Roheena Z Panni
- Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Snjezana Dogan
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Brian R Untch
- Department of Surgery, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Ronald A Ghossein
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA
| | - Bin Xu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.
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Rossi ED, Pantanowitz L, Hornick JL. Cytologic and histological features of rare nonepithelial and nonlymphoid tumors of the thyroid. Cancer Cytopathol 2021; 129:583-602. [PMID: 33493367 DOI: 10.1002/cncy.22404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 11/09/2022]
Abstract
Thyroid tumors can be classified into epithelial, nonepithelial, and nonprimary lesions. Nonepithelial thyroid tumors are rare. They can be of primary origin within the thyroid gland, arise secondary to contiguous growth from adjacent tissues, or represent metastatic disease. The incidence of nonepithelial tumors of the thyroid is only 1% to 2%, most of which are lymphomas; the remainder includes mesenchymal and histiocytic tumors. This review examines the cytohistological features of various nonepithelial and nonlymphoid tumors of the thyroid, including vascular lesions, neural tumors (including granular cell tumor and paraganglioma), smooth muscle tumors, solitary fibrous tumor, histiocytic neoplasms (eg, Langerhans cell histiocytosis and Rosai-Dorfman disease), and follicular dendritic cell sarcoma. Their differential diagnosis is discussed, including recommendations to prevent the pitfall of mistaking these rare tumors for more common epithelial thyroid neoplasms.
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Affiliation(s)
- Esther Diana Rossi
- Division of Anatomic Pathology and Histology, Catholic University of Sacred Heart, Rome, Italy
| | - Liron Pantanowitz
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Jason L Hornick
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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5
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Gubbi S, Thakur S, Avadhanula S, Araque KA, Filie AC, Raffeld M, Welch J, Del Rivero J, Kebebew E, Burman KD, Wartofsky L, Klubo-Gwiezdzinska J. Comprehensive guidance on the diagnosis and management of primary mesenchymal tumours of the thyroid gland. Lancet Oncol 2020; 21:e528-e537. [PMID: 33152312 DOI: 10.1016/s1470-2045(20)30332-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/26/2020] [Accepted: 06/05/2020] [Indexed: 02/06/2023]
Abstract
Most primary thyroid tumours are of epithelial origin. Primary thyroid mesenchymal tumours are rare but are being increasingly detected. A vast majority of thyroid mesenchymal tumours occur between the fourth and seventh decades of life, presenting as progressively enlarging thyroid nodules that often yield non-diagnostic results or spindle cells on fine needle aspiration biopsy. Surgery is the preferred mode of treatment, with adjuvant chemoradiotherapy used for malignant thyroid mesenchymal tumours. Benign thyroid mesenchymal tumours have excellent prognosis, whereas the outcome of malignant thyroid mesenchymal tumours is variable. Each thyroid mesenchymal tumour is characterised by its unique histopathology and immunohistochemistry. Because of the rarity and aggressive nature of malignant thyroid mesenchymal tumours, a multidisciplinary team-based approach should ideally be used in the management of these tumours. Comprehensive guidelines on the management of thyroid mesenchymal tumours are currently lacking. In this Review, we provide a detailed description of thyroid mesenchymal tumours, their clinical characteristics and tumour behaviour, and provide recommendations for the optimal management of these tumours.
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Affiliation(s)
- Sriram Gubbi
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Shilpa Thakur
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Shirisha Avadhanula
- Department of Endocrinology, Diabetes, and Metabolism, Cleveland Clinic, Cleveland, OH, USA
| | - Katherine A Araque
- Department of Endocrinology, Pacific Neuroscience Institute, John Wayne Cancer Institute, Santa Monica, CA, USA
| | - Armando C Filie
- National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Mark Raffeld
- National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - James Welch
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Jaydira Del Rivero
- National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Electron Kebebew
- Department of General Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Kenneth D Burman
- Department of Endocrinology, MedStar Washington Hospital Center, Washington, DC, USA
| | - Leonard Wartofsky
- Department of Endocrinology, MedStar Health Research Institute, Washington, DC, USA
| | - Joanna Klubo-Gwiezdzinska
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA.
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6
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Thompson LDR, Wei C, Rooper LM, Lau SK. Thyroid Gland Solitary Fibrous Tumor: Report of 3 Cases and a Comprehensive Review of the Literature. Head Neck Pathol 2019; 13:597-605. [PMID: 30758754 PMCID: PMC6854167 DOI: 10.1007/s12105-019-01012-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 01/14/2019] [Indexed: 02/07/2023]
Abstract
Solitary fibrous tumors of the thyroid gland are exceptionally rare. In order to further characterize the clinical and pathologic features of solitary fibrous tumor arising at this anatomic site, three cases of thyroid gland solitary fibrous tumor were analyzed in conjunction with 35 cases compiled from the English literature. Thyroid gland solitary fibrous tumors showed an equal sex distribution with a mean age at presentation of 54.4 years (range, 28-88 years). The patients typically presented with an asymptomatic, slow growing neck mass. Microscopically, the tumors were characterized by cytologically bland spindle cells with patternless growth, hypocellular and hypercellular areas, variable amounts of collagen, and ectatic, branching blood vessels. Two previous reported tumors were considered to be histologically malignant on the basis of increased mitotic activity, profound pleomorphism and tumor necrosis. Immunohistochemically, the tumor cells are variably positive with CD34, bcl-2, and CD99. STAT6 immunohistochemistry, performed on the current cases, demonstrated a strong, diffuse nuclear expression in all tumors. Among 26 patients with available follow up data (mean 47.3 months), one developed local recurrence and distant metastasis. Solitary fibrous tumors occurring in the thyroid gland are uncommon, but can be reliably diagnosed based on the presence of characteristic morphologic features as well as immunohistochemical expression of STAT6 and CD34. The majority of thyroid gland solitary fibrous tumors have exhibited an indolent clinical course, however experience is limited. The rare potential for aggressive clinical behavior requires clinical surveillance.
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Affiliation(s)
- Lester D. R. Thompson
- Southern California Permanente Medical Group, Department of Pathology, Woodland Hills Medical Center, 5601 De Soto Avenue, Woodland Hills, Los Angeles, CA 91365 US
| | - Christina Wei
- Southern California Permanente Medical Group, Department of Pathology, Woodland Hills Medical Center, 5601 De Soto Avenue, Woodland Hills, Los Angeles, CA 91365 US
| | - Lisa M. Rooper
- Department of Pathology, The Johns Hopkins Hospital, Baltimore, MD US
| | - Sean K. Lau
- Southern California Permanente Medical Group, Department of Pathology, Orange County-Anaheim Medical Center, Anaheim, CA US
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7
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Chen G, Liu Z, Su C, Guan Q, Wan F, Dong B, Bao L, Zhang W, Wang Y, Wang G. Primary peripheral nerve sheath tumors of the thyroid gland: A case report and literature review. Mol Clin Oncol 2015; 4:209-210. [PMID: 26893864 DOI: 10.3892/mco.2015.703] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 08/04/2015] [Indexed: 12/17/2022] Open
Abstract
Primary peripheral nerve sheath tumors (PNSTs) of the thyroid gland are rare, with fewer than 30 cases reported in the medical literature to date. Primary PNSTs of the thyroid gland are classified into malignant and benign PNSTs. The benign PNSTs may be further subclassified into neurofibromas and Schwannomas. This is the case report of a 51-year-old male patient presenting with multiple primary PNSTs involving the left lobe of the thyroid gland. The patient underwent total excision of the thyroid gland and the pathological results indicated a Schwannoma with Antoni type A and B cells. The literature was reviewed briefly and, to the best of our knowledge, this is the first case report of multiple primary PNSTs of the thyroid gland.
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Affiliation(s)
- Guang Chen
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Zengguang Liu
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Chang Su
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Qiang Guan
- Department of General Surgery, Changchun Central Hospital, Changchun, Jilin 130051, P.R. China
| | - Fang Wan
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Bingfei Dong
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Liang Bao
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Wenxin Zhang
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yinping Wang
- Department of Pathology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Guimin Wang
- Department of Thyroid Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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8
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Primary schwannoma of the thyroid gland involving the isthmus: report of a case. Surg Today 2012; 43:106-9. [PMID: 22623175 DOI: 10.1007/s00595-012-0200-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 11/03/2011] [Indexed: 10/28/2022]
Abstract
Primary thyroid schwannomas are extremely rare tumors and there are very few reports of such tumors in the literature. This report presents a rare case of schwannoma involving the isthmus of the thyroid in a 47-year-old male, presenting as a symptomatic predominating cold nodule within a multinodular goiter. The patient underwent total thyroidectomy. The histological examination indicated an Antoni A-type schwannoma. The clinical, radiological and pathological findings of the tumor are discussed, emphasizing the difficulty in reaching a correct preoperative diagnosis. Only 18 cases of primary schwannoma of the thyroid gland have so far been described in the literature and, this is only the second report of thyroid schwannoma localized in the isthmus.
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9
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Kandil E, Abdel Khalek M, Abdullah O, Dali D, Faruqui S, Khan A, Friedlander P, Jaffe BM, Crawford B. Primary peripheral nerve sheath tumors of the thyroid gland. Thyroid 2010; 20:583-6. [PMID: 20553194 DOI: 10.1089/thy.2009.0245] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Primary peripheral nerve sheath tumors (PNSTs) of the thyroid gland are exceptionally rare tumors that usually present as asymptomatic neck nodules in adults. This article presents a literature review of these tumors. SUMMARY PNSTs of the thyroid can be classified into benign and malignant. Only three cases of malignant PNSTs have been reported. Benign PNSTs of the thyroid include neurofibromas and schwannomas. Only two cases of isolated neurofibroma of the thyroid have been reported. Schwannomas are typically benign, slow-growing tumors that originate from neuronal schwann cells, with a clinical picture depending on the anatomic size and site. Pathologically, schwannomas are classified into Antoni A and Antoni B. Only 17 cases of schwannomas of the thyroid exist in literature to date. CONCLUSIONS Schwannomas of the thyroid gland are extremely rare and usually asymptomatic. Complete surgical resection is mandatory for care.
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Affiliation(s)
- Emad Kandil
- Division of Endocrine and Oncological Surgery, Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana 70112, USA.
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10
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Aron M, Kapila K, Verma K. Neural tumours of the neck presenting as thyroid nodules: a report of three cases. Cytopathology 2005; 16:206-9. [PMID: 16048507 DOI: 10.1111/j.1365-2303.2005.00246.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Neural tumours of the neck may at times secondarily involve the thyroid and manifest clinically as thyroid nodules. On cytological evaluation these nodules may be confused with other spindle lesions of the thyroid. We report two cases of schwannoma and one case of a malignant peripheral nerve sheath tumour (MPNST) of the neck, which presented as thyroid nodules and evaluate the role of cytology in identifying these tumours. METHODS The thyroid nodules in all the three cases were sampled by the non-aspiration technique using a 23-gauge needle. Both alcohol-fixed and air-dried smears were prepared and stained by the Papanicolaou and May-Grünwald-Giemsa stains. Cytology smears and histology sections from the resected specimens were reviewed, and the findings noted. RESULTS Both the cases of schwannoma were correctly identified on cytology while the case of MPNST could only be typed as a spindle cell tumour. However, on cytology it was not possible to state whether the tumours were thyroidal or extrathyroidal in origin. CONCLUSIONS Schwannomas of the neck are easily identifiable on cytology compared with MPNST. However, cytology alone is not helpful in identifying the origin of these tumours. As primary neural tumours of the thyroid are rare, the possibility of a soft tissue neural tumour extending into the thyroid should always be ruled out while evaluating these cases.
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Affiliation(s)
- M Aron
- Cytology Laboratory, Department of Pathology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.
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11
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Bagan JV, Sanchis JM, Jiménez Y, Murillo J, Poveda R, Diaz JM. Malignant peripheral nerve sheath tumor of the maxila. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.ooe.2004.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Pallares J, Perez-Ruiz L, Ros S, Panades MJ, Pardo-Mindan J, Lloreta J, Matias-Guiu X. Malignant peripheral nerve sheath tumor of the thyroid: a clinicopathological and ultrastructural study of one case. Endocr Pathol 2004; 15:167-74. [PMID: 15299203 DOI: 10.1385/ep:15:2:167] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Thyroid malignant peripheral nerve sheath tumors (TMPNST) are very uncommon neoplasms that can be confused with anaplastic carcinoma, Riedel's thyroiditis, or other soft tissue tumors that may occur in the thyroid region. An example of TMPNST is presented in this report. The tumor occurred in a 56-yr-old woman. Fine needle aspiration did not provide adequate material. After thyroidectomy, the lesion posed important problems in differential diagnosis. Immunohistochemical, molecular, and electron microscopic features were taken into consideration to arrive at the correct diagnosis. Tumor cells were focally positive for keratins, a feature that has not been described in peripheral nerve sheath tumors of the thyroid, but that has been occasionally seen in tumors from other locations. After thyroidectomy, the patient received radiotherapy. She is well without evidence of recurrence 10 mo after surgery.
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Affiliation(s)
- Judit Pallares
- Departments of Pathology and Surgery, Hospital Universitari Arnau de Vilanova, University of Lleida, 25198 Lleida, Spain
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