Keiko Ohkuwa

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BACKGROUND Radioiodine ablation after total thyroidectomy is the generally accepted treatment for patients with widely invasive follicular thyroid carcinoma (FTC). The therapeutic strategy for minimally invasive FTC, on the other hand, is still a matter of controversy. The histological diagnosis of minimally invasive FTC is often made after lobectomy. The(More)
Total thyroidectomy is well accepted as initial surgery for papillary thyroid cancer (PTC), but the extent of the thyroidectomy remains a matter of controversy. This study was designed to investigate the long-term clinical outcome of PTC patients who had undergone thyroid lobectomy and to elucidate the indications of lobectomy as initial surgery. The cases(More)
BACKGROUND Distant metastases are more common in patients with follicular thyroid carcinoma (FTC) than in patients with papillary thyroid carcinoma, and the outcome is often poorer in patients with distant metastases. In this study, we attempted to identify the risk factors for distant metastases in FTC. METHODS Between 1989 and 1997, 134 patients with(More)
Hürthle cell carcinoma (HCC) is a rare form of thyroid carcinoma and is considered an oxyphilic variant of follicular thyroid carcinoma. However, little is known about its biological characteristics or clinical behavior. We conducted a retrospective study to determine whether the prognosis of HCC differs from that of ordinary follicular thyroid carcinoma(More)
To examine the outcomes and risk factors in pediatric differentiated thyroid carcinoma (DTC) patients who were defined as TNM stage I because some patients develop disease recurrence but treatment strategy for such stage I pediatric patients is still controversial. We reviewed 57 consecutive TNM stage I patients (15 years or less) with DTC (46 papillary and(More)
We analyzed the utility of intraoperative parathyroid hormone (IOPTH) monitoring in minimally invasive surgery for primary hyperparathyroidism (pHPT). The subjects were the 167 consecutive patients with pHPT performed initial operation with or without IOPTH between January 2000 and December 2006. Patients were divided into 2 groups. A group who underwent(More)
The diagnosis of minimally invasive follicular thyroid carcinoma (MIFTC) is often made histologically after thyroid lobectomy. We attempted to determine whether completion thyroidectomy should be considered necessary for all patients diagnosed with MIFTC after thyroid lobectomy. The subjects of this study were a total of 324 patients who underwent thyroid(More)
Fine-needle aspiration biopsy cytology (FNABC) and ultrasonography (US) play an important role in differentiating benign thyroid nodules from malignant nodules. We retrospectively investigated the prevalence of follicular thyroid carcinoma (FTC) in patients with thyroid nodules whose FNABC and US readings were not malignant before thyroidectomy. Between(More)
Diffuse sclerosing variant (DSV) of papillary thyroid carcinoma (PTC) is a rare variant more common among younger patients. Excluding patients with microcarcinoma, 5848 patients with PTC underwent initial surgery between 1995 and 2011. Twenty-two patients (0.4 %) were histologically diagnosed with DSV, of whom 20 (91 %) were <45 years old. We compared(More)
The extent of thyroidectomy in Graves' disease is still a matter of controversy. Subtotal thyroidectomy has been used as the standard surgical procedure for Graves' disease in Japan, but high hyperthyroidism relapse rates have been reported. We retrospectively studied serial changes in the thyroid function Graves' disease patients after they had been(More)