Thyroglossal Duct Carcinoma with Concurrent Papillary Thyroid Carcinoma: A Case Report

ABSTRACT Objective: To report a case of thyroglossal duct carcinoma with concurrent papillary thyroid carcinoma Methods: Design: Case Report Setting: Tertiary National University Hospital Patient: One Results: A 46-year-old woman was diagnosed with thyroglossal duct carcinoma after undergoing a Sistrunk procedure. Due to presence of thyroid nodules, the patient underwent second stage thyroidectomy with central neck dissection which revealed papillary thyroid carcinoma. Conclusion: Thyroglossal duct carcinomas are rare entities and there is no current consensus regarding their management. Difficulties arise in the diagnosis of these tumors as they present similarly to benign thyroglossal duct cysts. Most cases are diagnosed postoperatively. Proper preoperative assessment including head and neck examination, biopsy, and radiologic imaging is necessary to recognize patients who could benefit from more aggressive management. Keywords: thyroglossal carcinoma; thyroglossal duct cyst; papillary thyroid carcinoma

Thyroglossal Duct Carcinoma Originating in the Hyoid Bone

Thyroglossal duct (TGD) carcinoma is a rare malignant tumor arising from remnants of thyroid tissue or the wall of the duct and generally occurs along the anatomic course of the TGD. TGD carcinoma originating in the hyoid bone is extremely rare but can occur since the TGD penetrates the hyoid bone on rare occasions. This report describes the case of a 30-year-old man with TGD carcinoma originating in the hyoid bone. Computed tomography demonstrated a mass in the hyoid bone that expanded the cortical bone of the hyoid. The mass had a central solid component with calcification and a marginal cystic component. When we encounter a calcified mass in the hyoid bone, we should consider TGD carcinoma among the differential diagnoses.

Correlations between ultrasonography performed by the ENT specialist and pathologic findings in the management of three cases with thyroglossal duct cyst

Thyroglossal duct cyst (TDC) has an increasing incidence. We present a series of three cases that benefited from the use of ultrasonography performed first hand by the ENT specialist. All cases underwent Sistrunk procedure and the diagnosis was confirmed by pathology results: one uncomplicated TDC, a thyroglossal duct carcinoma, and an infected TDC with the risk of becoming a diffuse cervical suppuration. Ultrasonography performed first hand by the ENT specialist enables a quick and thorough planning of the surgical procedure and management of the case.

Thyroglossal Duct Carcinoma in a Cat

ABSTRACT A 14 yr old castrated domestic shorthair cat presented for a fluid-filled structure in the ventral cervical region that had been present for 1 yr and had not resolved after repeated aspiration and drainage. Cervical computed tomography showed an approximately 10 cm, fluid-filled, multilobulated mass located on the ventrolateral right side of the cervical region extending into the thoracic inlet. Cytologic examination of the fluid revealed cystic fluid with evidence of chronic hemorrhage. The mass was surgically removed, and histopathologic examination revealed a thyroglossal duct carcinoma. Thyroid and parathyroid gland origin were ruled out by negative immunohistochemical staining for thyroglobulin, parathyroid hormone, calcitonin, and synaptophysin. No adjunctive treatment was performed and no recurrence was noted at 14 mo. Thyroglossal duct carcinoma has not been previously reported in a cat. There are two previous reports of squamous cell carcinoma of the thyroglossal duct in dogs. In humans, with complete removal and no evidence of metastasis, carcinoma of the thyroglossal duct has a good prognosis for recovery.