OBJECTIVETo explore the principles of diagnosis and treatment of chronic lymphocytic thyroiditis (CLT) coexistent with thyroid malignancy.

METHODSThe clinical data of 52 patients with CLT, including clinicopathologic features, treatment, and prognosis were retrospectively analyzed. Among these 52 patients, 40 patients had coexisting thyroid carcinoma (TC group) and 12 had coexisting thyroid lymphoma (TL group).

RESULTSThese two thyroid malignancies accounted for 13.87% of all the CLT inpatients during this period, in which 10.67% were CLT with carcinoma and 3.20% were CLT with lymphoma. Significant differences existed between TC group and TL group in sex (P = 0.008) , age (P = 0.000), and B-mode ultrasound findings (P = 0.000). Most patients in TC group received total lobectomy of one lobe and subtotal lobectomy of the other side, of which some received elective lymphadenectomy. The operations varied among patients in TL group, and most of them received chemotherapy after surgery. The median follow-up was (35.51 +/- 39.84) months for 37 patients in TC group, and 36 patients survived with a median period of (34.50 +/- 39.91) months; the median follow-up was (39.50 +/- 29.00) months for 12 patients in TL group, and 10 patients survived with a median period of (44.70 +/- 28.78) months.

CONCLUSIONSCLT with thyroid malignancies are not uncommon in clinical practice. While thyroid carcinoma accounts for majority of these malignancies, its clinicopathologic features, treatment, and prognosis differs with thyroid lymphoma. Surgery may be appropriate for CLT patients with rapid thyroid enlargement or nodule, and for patients with solitary solid nodule or nodules with calcification revealed by B ultrasound.

Adult ; Aged ; Carcinoma ; complications ; diagnosis ; therapy ; Female ; Follow-Up Studies ; Hashimoto Disease ; complications ; diagnosis ; therapy ; Humans ; Lymphoma ; complications ; diagnosis ; therapy ; Male ; Middle Aged ; Retrospective Studies ; Thyroid Neoplasms ; complications ; diagnosis ; therapy

Riedel's thyroiditis (RT) is a rare chronic inflammatory disease of the thyroid gland. It is characterized by a fibroinflammatory process that partially destroys the gland and extends into adjacent neck structures. Its clinical manifestation can mask an accompanying thyroid neoplasm and can mimic invasive thyroid carcinoma. Therefore, diagnosis can be difficult prior to surgical removal of the thyroid, and histopathologic examination of the thyroid is necessary for a definite diagnosis. The concurrent presence of RT and other thyroid diseases has been reported. However, to our knowledge, the association of RT with acute suppurative thyroiditis and micropapillary carcinoma has not been reported. We report a rare case of concurrent RT, acute suppurative thyroiditis, and micropapillary carcinoma in a 48-year-old patient.
Anti-Bacterial Agents/therapeutic use ; Biopsy ; Carcinoma/*complications/diagnosis/therapy ; Female ; Hashimoto Disease/*complications/diagnosis/therapy ; Hormone Replacement Therapy ; Humans ; Lymph Node Excision ; Middle Aged ; Thyroid Neoplasms/*complications/diagnosis/therapy ; Thyroidectomy ; Thyroiditis/*complications/diagnosis/therapy ; Thyroiditis, Suppurative/*complications/diagnosis/therapy ; Thyroxine/therapeutic use ; Tomography, X-Ray Computed ; Treatment Outcome

PURPOSE: Thyroid cancer is a rare disease in pediatric population, but its incidence rate is increasing. The aim of this report is to present a single institution experience of pediatric thyroid cancer and to identify clinical features, predisposing factors, and postoperative course of pediatric thyroid cancer. METHODS: We retrospectively reviewed 35 pediatric patients who underwent operation due to thyroid cancer at Seoul National University Children's Hospital between May 1997 and January 2017. The median follow-up period was 70 months (range, 5–238 months). RESULTS: The mean age at operation was 12.0±5.91 years and 27 patients were female. The underlying conditions in patients included history of chemoradiotherapy for previous other malignancies (n=4), hypothyroidism (n=3), history of chemotherapy (n=2), family history of thyroid cancer (n=1) and history of radiation therapy (n=1). The initial symptoms were palpable neck mass (n=21) and incidental findings (n=11). Total thyroidectomy (n=30) or unilateral lobectomy (n=5) were performed. There were 15 postoperative complications including transient hypocalcemia in 14 patients and Horner's syndrome in 1 patient. The most common pathologic cell type was papillary thyroid cancer (n=29). Extrathyroid extension and lymph node invasion were found in 25 patients and 27 patients, respectively. Thirteen patients showed multifocality. During follow-up period, 5 patients underwent additional operation because of tumor recurrence in lymph nodes. Lung metastasis was detected in 3 patients at the time of diagnosis and in 3 patients during follow-up period. The mortality rate was zero and mean disease-free survival was 83.7±47.9 months. CONCLUSION: Pediatric thyroid cancer has lower mortality rate and recurrence rate as seen in this study despite the advanced stage at diagnosis. A thorough follow-up of patients with an underlying condition such as history of chemoradiotherapy and understanding new pediatric guideline can be helpful to maximize patients' survival and prognosis.
Causality ; Chemoradiotherapy ; Diagnosis ; Disease-Free Survival ; Drug Therapy ; Female ; Follow-Up Studies ; Horner Syndrome ; Humans ; Hypocalcemia ; Hypothyroidism ; Incidence ; Incidental Findings ; Lung ; Lymph Nodes ; Mortality ; Neck ; Neoplasm Metastasis ; Pediatrics ; Postoperative Complications ; Prognosis ; Rare Diseases ; Recurrence ; Retrospective Studies ; Seoul ; Thyroid Gland* ; Thyroid Neoplasms* ; Thyroidectomy