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Case Study
- Encapsulated Papillary Thyroid Tumor with Delicate Nuclear Changes and a KRAS Mutation as a Possible Novel Subtype of Borderline Tumor
- Kenji Ohba, Norisato Mitsutake, Michiko Matsuse, Tatiana Rogounovitch, Nobuhiko Nishino, Yutaka Oki, Yoshie Goto, Kennichi Kakudo
- J Pathol Transl Med. 2019;53(2):136-141. Published online January 14, 2019
- DOI: https://doi.org/10.4132/jptm.2018.12.07
- 6,831 View
- 181 Download
- 10 Web of Science
- 6 Crossref
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Abstract
PDF - Although papillary thyroid carcinoma (PTC)–type nuclear changes are the most reliable morphological feature in the diagnosis of PTC, the nuclear assessment used to identify these changes is highly subjective. Here, we report a noninvasive encapsulated thyroid tumor with a papillary growth pattern measuring 23 mm at its largest diameter with a nuclear score of 2 in a 26-year-old man. After undergoing left lobectomy, the patient was diagnosed with an encapsulated PTC. However, a second opinion consultation suggested an alternative diagnosis of follicular adenoma with papillary hyperplasia. When providing a third opinion, we identified a low MIB-1 labeling index and a heterozygous point mutation in the KRAS gene but not the BRAF gene. We speculated that this case is an example of a novel borderline tumor with a papillary structure. Introduction of the new terminology “noninvasive encapsulated papillary RAS-like thyroid tumor (NEPRAS)” without the word “cancer” might relieve the psychological burden of patients in a way similar to the phrase “noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP).”
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Citations
Citations to this article as recorded by
- The Asian Thyroid Working Group, from 2017 to 2023
Kennichi Kakudo, Chan Kwon Jung, Zhiyan Liu, Mitsuyoshi Hirokawa, Andrey Bychkov, Huy Gia Vuong, Somboon Keelawat, Radhika Srinivasan, Jen-Fan Hang, Chiung-Ru Lai
Journal of Pathology and Translational Medicine.2023; 57(6): 289. CrossRef - Whole Tumor Capsule Is Prognostic of Very Good Outcome in the Classical Variant of Papillary Thyroid Cancer
Carlotta Giani, Liborio Torregrossa, Teresa Ramone, Cristina Romei, Antonio Matrone, Eleonora Molinaro, Laura Agate, Gabriele Materazzi, Paolo Piaggi, Clara Ugolini, Fulvio Basolo, Raffaele Ciampi, Rossella Elisei
The Journal of Clinical Endocrinology & Metabolism.2021; 106(10): e4072. CrossRef - Evidence of Cooperation between Hippo Pathway and RAS Mutation in Thyroid Carcinomas
Thaise Nayane Ribeiro Carneiro, Larissa Valdemarin Bim, Vanessa Candiotti Buzatto, Vanessa Galdeno, Paula Fontes Asprino, Eunjung Alice Lee, Pedro Alexandre Favoretto Galante, Janete Maria Cerutti
Cancers.2021; 13(10): 2306. CrossRef - Capsular Invasion Matters Also in “Papillary Patterned” Tumors: A Study on 121 Cases of Encapsulated Conventional Variant of Papillary Thyroid Carcinoma
Dilara Akbulut, Ezgi Dicle Kuz, Nazmiye Kursun, Serpil Dizbay Sak
Endocrine Pathology.2021; 32(3): 357. CrossRef - Noninvasive encapsulated papillary RAS-like thyroid tumor (NEPRAS) or encapsulated papillary thyroid carcinoma (PTC)
Pedro Weslley Rosario
Journal of Pathology and Translational Medicine.2020; 54(3): 263. CrossRef - Updates in the Pathologic Classification of Thyroid Neoplasms: A Review of the World Health Organization Classification
Yanhua Bai, Kennichi Kakudo, Chan Kwon Jung
Endocrinology and Metabolism.2020; 35(4): 696. CrossRef
- The Asian Thyroid Working Group, from 2017 to 2023
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