Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review
Authors: Ariana Marie Martin, Bastien A Valencia-Sanchez, Natalia Villarreal, Ingrid Freeze, Adolfo Montemayor-Alatorre
Background: Schwannomas originating from the ansa cervicalis represent an exceptionally infrequent occurrence. To date, less than 5 cases have been reported in the English literature. We present a multimedia case report of an ansa cervicalis schwannoma, accompanied by a surgical video, in a patient whose initial clinical assessment suggested potential thyroid pathology. Case Presentation: A 51-year-old woman was referred to the otolaryngology department following an incidental finding of a thyroid nodule on a head and neck CT scan. Imaging revealed the presence of two lesions: a TIRADS 3 left thyroid nodule, and a benign tumor originating from the peripheral nerve sheath of the ansa cervicalis, located adjacent to the right thyroid lobe. Intraoperatively, the second lesion was discovered to originate from a branch of the superior root of the ansa cervicalis. Subsequent histopathological analysis confirmed the diagnosis of a schwannoma. Conclusion: Schwannomas originating from the ansa cervicalis pose a diagnostic challenge, often susceptible to misinterpretation and confusion with other lesions. This case report highlights radiological and surgical techniques that can be used to identify the origin of these tumors, both preoperatively and intraoperatively.
Keywords: Keywords: Schwannoma, ansa cervicalis, ansa hypoglossi, descending hypoglossal ramus, neuroma, case report.
Authors
Correspondence to:
Adolfo Montemayor-Alatorre, Department of Otolaryngology - Head and Neck Surgery, Hospital Zambrano Hellion TecSalud, Monterrey, Mexico adolfo.montemayor@medicos.tecsalud.mx
Publication history:
Received 02 Oct 2023
Revised 02 Nov 2023
Accepted 17 Nov 2023
Published online 14 Dec 2023
Published in print 07 Mar 2024
Martin AM, Valencia-Sanchez BA, Villarreal N, Freeze I, Montemayor-Alatorre A. Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. EJMCR. 2023; 7(7): 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin AM, Valencia-Sanchez BA, Villarreal N, Freeze I, Montemayor-Alatorre A. Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. https://www.ejmcr.com/?mno=171298 [Access: May 12, 2024]. doi:
10.24911/ejmcr/173-1695955177
Martin AM, Valencia-Sanchez BA, Villarreal N, Freeze I, Montemayor-Alatorre A. Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. EJMCR. 2023; 7(7): 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin AM, Valencia-Sanchez BA, Villarreal N, Freeze I, Montemayor-Alatorre A. Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. EJMCR. (2023), [cited May 12, 2024]; 7(7): 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin, A. M., Valencia-Sanchez, . B. A., Villarreal, . N., Freeze, . I. & Montemayor-Alatorre, . A. (2023) Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. EJMCR, 7 (7), 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin, Ariana Marie, Bastien A. Valencia-Sanchez, Natalia Villarreal, Ingrid Freeze, and Adolfo Montemayor-Alatorre. 2023. Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. European Journal of Medical Case Reports, 7 (7), 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin, Ariana Marie, Bastien A. Valencia-Sanchez, Natalia Villarreal, Ingrid Freeze, and Adolfo Montemayor-Alatorre. "Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review." European Journal of Medical Case Reports 7 (2023), 147-152. doi:
10.24911/ejmcr/173-1695955177
Martin, Ariana Marie, Bastien A. Valencia-Sanchez, Natalia Villarreal, Ingrid Freeze, and Adolfo Montemayor-Alatorre. "Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review." European Journal of Medical Case Reports 7.7 (2023), 147-152. Print. doi:
10.24911/ejmcr/173-1695955177
Martin, A. M., Valencia-Sanchez, . B. A., Villarreal, . N., Freeze, . I. & Montemayor-Alatorre, . A. (2023) Schwannoma of the Ansa Cervicalis Masquerading as a Thyroid Nodule: A Multimedia Case Report and Literature Review. European Journal of Medical Case Reports, 7 (7), 147-152. doi:
10.24911/ejmcr/173-1695955177