Chondroma of laryngeal cartilage mimicking thyroid tumor
A 73-year-old Chinese man was found a cervical mass for 1 month. He had a history of coronary heart disease for 2 years, but no relevant personal or family history of malignancy. Physical examination showed bilateral neck asymmetry, the trachea was deflected to the left, the carotid pulse was normal, approximately 6 × 5 cm solid masses were felt in the right lobe of the thyroid gland. The tumor mass border was unclear with smooth surface, and the tumor moved up and down with swallowing. The left lobe of the thyroid gland had no palpable mass and the neck had no palpable swollen lymph nodes. Accessory examination of neck color Doppler ultrasound at our hospital showed increase in size of the right lobe of the thyroid gland, which had abnormal shape. The upper right pole of the thyroid gland had an approximately 5.6 × 6.0 × 4.2 cm sized mass, with unclear margin, and multiple cystic nodules in the thyroid.

The CT of thyroid showed increase in size of the right lobe of the thyroid gland, and an approximately 5.6 × 6.0 × 4.2 cm sized mass, the trachea was compressed and deflected to the left, the thyroid cartilage was compressed, deformed and reached the right subglottic region. The right thyroid lump had multiple calcifications, indicative of a tumor. Electronic laryngoscope examination showed ventricular bands thickening, the right ventricular bands compartment showed a rice-like projection, arytenoid region movement was poor.

Thyroid function test was 5.07 mIU/L. The patient underwent subtotal thyroidectomy and excisional biopsy of neck mass under general anesthesia. Intraoperative findings indicated a hard mass in the thyroid gland area, the lateral border and the lower bound were closely related to the surrounding soft tissues, but there was an extremely close relationship between the medial border, the thyroid cartilage, and cricoid cartilage, with no gap between them. An ENT doctor was invited for intraoperative consultation, who suggested that some of the tumors should be removed and frozen. The rapid pathology of the tumor (thyroid right lateral lobe) indicated chondroma. The ENT doctor suggested laryngeal chondroma resection and tracheotomy under general anesthesia. Intraoperative findings indicated that the right lower half of the thyroid cartilage and the right half of the cricoid cartilage were chondroma, and complete resection of the tumor was performed.

Postoperative pathology examination showed (right lobe of thyroid gland and larynx) chondroma. Given the advanced age of the patient, long surgical duration and poor cardiorespiratory function, the patient suffered sudden cardiac death after the operation.

Source: Medicine: March 2019 - Volume 98 - Issue 13 - p e15005

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