Medullary Thyroid Cancer with Paraganglioma-Like Pattern Diagnosed During Pregnancy: A Case Report and Literature Revision

Author(s): Anna De Tullio, Giuseppe Lisco, Loren Duda, Giuseppina Renzulli, Vincenzo Triggiani*

Journal Name: Endocrine, Metabolic & Immune Disorders - Drug Targets
Formerly Current Drug Targets - Immune, Endocrine & Metabolic Disorders

Volume 20 , Issue 2 , 2020

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Graphical Abstract:


Introduction: Medullary thyroid carcinoma (MTC) is an infrequent thyroid malignancy rarely observed and managed during pregnancy. An accurate diagnostic workup is extremely important in this clinical setting to correctly diagnose and treat the disease, avoiding both maternal and fetal complications.

Objective: We report our experience in managing an MTC incidentally diagnosed during pregnancy in a 28-year female, highlighting critical aspects through the diagnostic workup. Additionally, we provide a literature revision searching on PubMed terms related to “medullary thyroid carcinoma”, “primary thyroid paraganglioma”, “paraganglioma-like medullary thyroid cancer” in relationship with a nodular appearance at neck US, serum CT measurement, cytological and histological findings.

Methods: Specimens for cytological evaluation were stained with the Papanicolaou method while tissue sections were stained with hematoxylin and eosin and Congo red stain. Immunohistochemical evaluation was also performed for thyroid transcription factor-1, enolase, thyroglobulin, cytokeratin, chromogranin A, S-100 protein, glial fibrillary acidic protein, calcitonin and Ki-67.

Results: Serum CT was incidentally found to be elevated in two consecutive venous samples. However, the cytological assessment of the fine needle aspiration (FNAc) showed “cells with round-shaped nuclei and granular chromatin, organized to form nests or syncytial flaps, scattered among histocytes, and immunocytochemical positivity for CT, thyroid transcriptional factor-1, cytokeratin, S-100 protein”, highlighting a suspicion of both MTC and intrathyroidal paraganglioma. MTC was finally supposed after the evidence of a really elevated CT (3,726 pg/ml) measurement in the FNA washout fluid. After a careful discussion about both risks and benefits, the patient decided to postpone the surgery after the delivery.

Conclusion: The histological diagnosis finally confirmed a rare case of paraganglioma-like MTC (T1 N0 Mx), emphasizing the complexity of our differential diagnosis, between an MTC and a thyroidal paraganglioma. In similar cases, due to a relevant impact on surgical timing, patients should be adequately informed about both risk and benefits of the surgery during pregnancy, and a careful management of the disease is required until and after surgery.

Keywords: Medullary thyroid carcinoma, thyroid paraganglioma, paraganglioma-like medullary thyroid cancer, immunocytochemical, immunohistochemical, neck ultrasound.

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Year: 2020
Published on: 02 August, 2019
Page: [295 - 302]
Pages: 8
DOI: 10.2174/1871530319666190802142634
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