Logo Medical Science Monitor

Call: +1.631.470.9640
Mon - Fri 10:00 am - 02:00 pm EST

Contact Us

Logo Medical Science Monitor Logo Medical Science Monitor Logo Medical Science Monitor

01 April 2008

Mixed medullary and follicular cell carcinoma of the thyroid in a 71-year-old man with history of malignant melanoma

Pavel Maruna, Jaroslava Duskova, Zdena Limanova, Sarka Dvoraková, Eliska Vaclavikova, Bela Bendlova

Med Sci Monit 2008; 14(4): CS31-36 :: ID: 850304


Background: Mixed medullary-follicular carcinoma of the thyroid with a pleomorphic pattern is a rare malignant epithelial tumor characterized by clinical and immunohistochemical features of follicular and parafollicular thyroid cells. Different molecular mechanisms for mixed thyroid tumors have been suggested.
Case Report: We describe a 71-year-old man with a history of malignant melanoma with mixed medullary-follicular thyroid carcinoma. Cytology results of a fine needle aspiration biopsy were suspicious of a thyroid carcinoma. The patient underwent a total thyroidectomy for a solitary thyroid nodule in the right lobe. No lymph node metastases were present. Histopathology and immunohistochemistry revealed a mixed medullary and follicular cell carcinoma that showed characteristic patterns and calcitonin and thyroglobulin positivities in many of the tumor cells. The tumor was not associated with multiple endocrine neoplasia type 2. Detection of RET proto-oncogene point mutations in risk exons 10, 11, 13, 14, 15, and 16 was negative. Two polymorphisms, one in exon 11 G691S (GGT→AGT) and another in exon 15 S904S (TCC→TCG) were detected.
Conclusions: A mixed differentiated thyroid tumor is a diagnostic challenge with fine needle aspiration. Definitive diagnosis remains the domain of histology because of the necessity of topographic information. The origins of this rare tumor entity are unclear. The possible association with the uncommon polymorphism G691S of the RET proto-oncogene is discussed.

Keywords: Follow-Up Studies, Melanoma - pathology, Thyroid Neoplasms - surgery



04 June 2022 : Editorial  

Editorial: Acute Hepatitis of Unknown Origin in Children. Is Autoimmunity at Play?

Nahum Mendez-Sanchez, Shreya C. Pal
Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico

DOI: 10.12659/MSM.937371

Med Sci Monit 2022; 28:e937371

In Press

23 Jun 2022 : Clinical Research  

A Real-World Study to Compare the Safety and Efficacy of Paritaprevir/Ombitasvir/Ritonavir and Dasabuvir, w...

Med Sci Monit In Press; DOI: 10.12659/MSM.936706  

22 Jun 2022 : Clinical Research  

A Single-Center Study Comparing the Effects of Thoracic Spine Manipulation vs Mobility Exercises in 26 Offi...

Med Sci Monit In Press; DOI: 10.12659/MSM.937316  

21 Jun 2022 : Clinical Research  

Optimal Timing and Outcomes of Minimally Invasive Approach in Acute Biliary Pancreatitis

Med Sci Monit In Press; DOI: 10.12659/MSM.937016  

16 Jun 2022 : Clinical Research  

Renal Manifestations in Inflammatory Bowel Disease: A Cohort Study During the Biologic Era

Med Sci Monit In Press; DOI: 10.12659/MSM.936497  

Most Viewed Current Articles

30 Dec 2021 : Clinical Research  

Retrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...

DOI :10.12659/MSM.935379

Med Sci Monit 2021; 27:e935379

08 Mar 2022 : Review article  

A Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...

DOI :10.12659/MSM.936292

Med Sci Monit 2022; 28:e936292

01 Nov 2020 : Review article  

Long-Term Respiratory and Neurological Sequelae of COVID-19

DOI :10.12659/MSM.928996

Med Sci Monit 2020; 26:e928996

01 Jan 2022 : Editorial  

Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...

DOI :10.12659/MSM.935952

Med Sci Monit 2022; 28:e935952

Your Privacy

We use cookies to ensure the functionality of our website, to personalize content and advertising, to provide social media features, and to analyze our traffic. If you allow us to do so, we also inform our social media, advertising and analysis partners about your use of our website, You can decise for yourself which categories you you want to deny or allow. Please note that based on your settings not all functionalities of the site are available. View our privacy policy.

Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750