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Eloy C, Vinagre J, Cameselle-Teijeiro J, Paiva ME, Soares P, Sobrinho-Simões M. Tumor-in-Tumor of the Thyroid With Basaloid Differentiation: A Lesion With a Solid Cell Nest Neoplastic Component? Int J Surg Pathol 2011; 19:276-80. [DOI: 10.1177/1066896910393506] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This study describes an encapsulated thyroid tumor having 3 different concentric appearances in a 70-year-old man. The most peripheral neoplasm showed features of a microfollicular adenoma; the intermediate lesion displayed typical features of the follicular variant of papillary thyroid carcinoma (FVPTC); and the main, central neoplasm, showed a basaloid configuration. At variance with the other neoplasms, the latter component exhibited high mitotic activity. Necrosis, angio-invasion, or capsular invasions were not observed. The centrally located neoplasm was immunoreactive for several cytokeratins, p63, carcinoembryonic antigen, and galectin-3, and negative for thyroid transcription factor 1, thyroglobulin, calcitonin, CD5, and CK20, featuring a phenotype similar to that of thyroid solid cell nests. A N-RAS mutation was found both in the basaloid and in the FVPTC components. The clinicopathological and immunohistochemical data ruled out the alternative possibilities of intrathyroidal metastasis and tumor from ectopic (thymic, parathyroid, or salivary gland) tissues.
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Affiliation(s)
- Catarina Eloy
- Hospital de São João, Porto, Portugal, University of Porto, Porto, Portugal, Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal,
| | - João Vinagre
- University of Porto, Porto, Portugal, Institute of Biomedical Sciences Abel Salazar, Porto, Portugal, Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
| | | | | | - Paula Soares
- University of Porto, Porto, Portugal, Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
| | - Manuel Sobrinho-Simões
- Hospital de São João, Porto, Portugal, University of Porto, Porto, Portugal, Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
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Paggi A, Trimarchi CP, Cavallaro A. An ectopic parathyroid adenoma revealed by L-thyroxine side effect on bone. Case report. Endocr Res 1997; 23:205-12. [PMID: 9378107 DOI: 10.3109/07435809709031854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Hyperparathyroidism due to an ectopic parathyroid adenoma commonly is revealed by parathyroid hormone (PTH) high serum level and its clinical effects on bone loss. We report a case in which exogenous L-thyroxine side effect on bone in the treatment of thyroid solitary nodule disease produced bone loss in a patient with subclinical hyperparathyroidism due to an ectopic parathyroid adenoma. Our case report suggests the importance of monitoring both clinical symptomatology and calcium and phosphorous serum levels as routine lab investigation in all patients who receive L-thyroxine treatment.
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Affiliation(s)
- A Paggi
- 2nd Medical Clinic, University La Sapienza, Rome, Italy
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