• Korean Journal of Head & Neck Oncology
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• v.14 no.2
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• pp.253-259
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• 1998

The increasing risk of subsequent malignancy after treatment of malignant lymphoma is well known, which is mainly due to longer survival of these patients. Radiotherapy at an early stage of Hodgkin's disease or non-Hodgkin's lymphoma is accepted to be associated with future occurrence of secondary thyroid cancer. Nevertheless, the synchronous presentation of these malignancies is extremely rare. Well differentiated thyroid cancer, a slow-growing tumor that responds to therapy with surgery and radioactive iodine, is associated with prolonged survival. therefore, it is important to make this diagnosis in patients who show evidence of malignant lymphoma. Furthermore, appropriate treatment must be considered for thyroid cancer to improve the prognosis of these patients. We herein reported 4 cases of synchronous thyroid cancer and malignant lymphoma in patients who had not previously recieved radiotherapy or chemotherapy.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1993.05a
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• pp.109-109
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• 1993

Fourth branchial pouch anomaly is an extremely rare condition involving the pharyngeal apparatus with only about 30 cases having been reported in the last 20 years. It almost invariably occurs on the left side and typically presents with repeated episodes of neck swelling, recurrent thyroiditis, or repeated bouts of retropharyngeal abscess. This is a presentation of 2 patient with pyriform sinus fistula, presumably of fourth branchial origin, which, were successfully closed with 10ole trichloroacetic acid chemical cautery. Details of the cases along with the summary of embryology and fourth branchial anomaly are given.

• Korean Journal of Head & Neck Oncology
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• v.13 no.1
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• pp.69-73
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• 1997

We have experienced a case of occult papillary thyroid carcinoma presenting as an anterior mediastinal mass in a 40-year-old man. The CT scan revealed a huge mass behind the manubrium of the sternum but the ultrasound examination failed to detect any lesion and developmental defect in the thyroid. Excision of the mediastinal mass and total thyroidectomy were carried out. Histologically, the mediastinal mass turned out to be papillary carcinoma without any portion of the normal thyroid tissue or normal lymph node tissue and the thyroid gland showed a tiny papillary carcinoma with the diameter of 0.3cm. Although a mediastinal mass as the sole presentation of the thyroid carcinoma is very rare, we suggest that a mediastinal mass should be added to the list of possible metastatic thyroid carcinoma.

• Korean Journal of Head & Neck Oncology
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• v.38 no.1
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• pp.65-68
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• 2022

Thyroglossal duct cyst (TGDC) is the most common congenital cyst in the neck and usually presents in children. It is most commonly located at the infrahyoid level. However, intrathyroid TGDC in the adult is extremely rare and its pathogenesis remains unclear. Curiously, an intrathyroid TGDC was found on the lateral aspect of the inferior pole of the thyroid gland. Given the unique position of this lesion, and its capacity to stimulate other nodules in the thyroid, it should be differentiated from other lateral neck masses, such as: thymic cysts, branchial cleft cysts, cystic hygroma, lipomas, lymphadenopathies, cervical teratomas, and lymphomas. In this case, a separate cystic mass was found in the right inferior pole of the thyroid gland and extended to the mediastinum. We confirmed it as TGDC by pathology and histological examination.

• Korean Journal of Head & Neck Oncology
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• v.40 no.1
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• pp.23-26
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• 2024

Mucosa-associated lymphoid tissue (MALT) lymphomas comprise 7.6% of non-Hodgkin's lymphomas (NHLs) and they are recently recognized B-cell subset of NHLs. They are originated from gastrointestinal tract most frequently but may also occur in other organs including head and neck, lung, skin, thyroid and breast. Primary thyroid lymphomas (PTLs) constitute up to 5% of all thyroid malignancies. Diffuse large B-cell lymphoma is most common type of PTLs and MALT lymphoma is relatively rare subtype of PTLs. Thyroid MALToma arises in chronic inflammatory conditions with autoimmune or infectious etiologies. The optimal treatment regimen still remains controversial. However, It is reported that localized thyroid MALT lymphoma has excellent survival rate after surgical resection alone. We report a case of 48-years-old woman with primary thyroid MALToma.

• Journal of Chest Surgery
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• v.29 no.9
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• pp.1010-1016
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• 1996

Thymectomy is an accepted therapeutic modality for patients with myasthenia gravis. The selection of patients for operation, the timing of operation and the surgical approach are still controversial. We reviewed 82 patientsraged 13 to 66 years; mean age, 37.7 years treated with transsternal thymectomy between January 1983 and December 1994. Patients were symptomatically staged according to the modified Osserman's classification. There was one hospital death and postoperative follow-up was obtained on 75 patients. During a mean follow up of 56.9 months, 64 patients (85.3%) benefited from the operation with complete remis ion achieved in 28(37.3%). The thyroid disease was present in 8 patients, of whom 7(87. 5%) achieved complete remission in contrast to 21 (31.3%) of the 67 patients without thyroid disease. The disease duration less than 2 years in 32 patients was associated with complete remission in 16 (50%) in contrast to remission in 12(27.4%) of the 43 patients whose disease duration was more than 2 years. In conclusion, the complete remission rate after transsternal thymectomy was affected by the presence of thyroid disease and disease duration. Myasthenia gravis with late onset(>40 years), thymoma pathology, old age and male gender appear to decrease the complete remission rate after transsternal thymectomy, although it was not statistically significant. There was no difference of complete'remission rate between normal and hyperplasia of thymus. Transsternal thymectomy was found to be beneficial in most patients with myasthenia gravis, but the majority of patients with ocular disease did not b nefit from the operation.

• The Korean Journal of Zoology
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• v.23 no.2
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• pp.89-108
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• 1980

Comparative studies on the parafollicular cells of the some mammalian species from five different orders were carried out; i.e., man from Primates, cattle, pig, and black goat from Artiodactyla, dog from Carnivora, rabbit from Lagomorpha, rat, mouse, and squirrel from Rodentia. For this study, various special techniques for the parafollicular cells, including Grimelius' silver impregnation method (Sawicki and Bajko, 1974), Singh's argentaffin method (Singh, 1964), HCl-toluidine blue stain (Sawicki, 1971), and HCl-lead hematoxylin stain (Solcia et al., 1969), were applied. Authors obtained the following results: 1. Number of parafollicular cells in the same area of thyroid tissues are significantly different from species to species. Number of cells were largest in dog and less cells were found in the following orders; rat, squirrel, mouse, rabbit, cattle, pig, black goat and finally the smallest number in man. 2. Distribution of parafollicular cells within thyroid gland are significantly different from portion to portion in case of cattle, rabbit, squirrel and mouse, but it is not significant in dog, man, pig, black goat and rat (see Table 1-1 and 1-2). 3. In dog, clustered parafollicular cells are located usually in the interfollicular space, and groups of parafollicular cells are located in the para-and/or inter-follicular positions in rabbit. But in the other animals parafollicular cells are found solitarily in the intra-and/or para-follicular positions. 4. The shape of parafollicular cells shows oval to round contour in dog, but it is polymorphic, for example, spindle, conical, oval, round or elongated with cytoplasmic processes, in the other animals. 5. Size of parafollicular cells is larger in cattle, dog and pig, smaller in rat, mouse and squirrel, and medium-size in rabbit, man and black goat. 6. Parafollicular cells of pig, cattle, dog and squirrel are observed to contain densely packed granules, whereas those of mouse, rat and man contain relatively scanty granules. 7. Parafollicular cells of all the mammals show more or less positive reaction to Grimelius' argyrophile silver impregnation method, HCl-toluidine blue stain and HCl-lead hematoxylin stain, whereas they show negative reaction to argentaffin method (see Table 2). 8. Considering the above finding, it is concluded that there are species differences in the distribution, location and shape of parafollicular cells, and infer that preferable staining method should be selected for reliable detection of parafollicular cells, beacuse staining methods applied on the cells in this study show variable reactions according to species.

• Journal of the Korean Society of Radiology
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• v.6 no.4
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• pp.281-290
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• 2012

The difference of radiation dose of MDCT due to different protocols between hospitals was analyzed by CTDI, DLP, the number of Slice and the number of DLP/Slice in 30 cases of the head, the abdomen and the chest that have 10 cases each from MDCT examination of the department of diagnostic imaging of three general hospitals in Gyeongsangbuk-do. The difference of image quality, CTDI, DLP, radiation dose in the eye and radiation dose in thyroid was analyzed after both helical scan and normal scan for head CT were performed because a protocol of head CT is relatively simple and head CT is the most frequent case. Head CT was significantly higher in two-thirds of hospitals compared to A hospital that does not exceed a CTDI diagnostic reference level (IAEA 50mGy, Korea 60mGy) (p<0.001). DLP was higher in one-third of hospitals than a diagnostic reference level of IAEA 1,050mGy.cm and Korea 1,000mGy.cm and two-thirds exceeded the recommendation of Korea and those were significantly higher than A hospital that does not exceed a diagnostic reference level (p<0.001). Abdomen CT showed 119mGy that was higher than a diagnostic reference level of IAEA 25mGy and Korea 20mGy in one-third. DLP in all hospitals was higher that Korea recommendation of 700mGy.cm. Among target hospitals, C hospital showed high radiation dose in all tests because MPR and 3D were of great importance due to low pitch and high Tube Curren. To analyze the difference of radiation dose by scan methods, normal scan and helical scan for head CT of the same patient were performed. In the result, CTDI and DLP of helical CT were higher 63.4% and 93.7% than normal scan (p<0.05, p<0.01). However, normal scan of radiation dose in thyroid was higher 87.26% (p<0.01). Beam of helical CT looked like a bell in the deep part and the marginal part so thyroid was exposed with low radiation dose deviated from central beam. In addition, helical scan used Gantry angle perpendicularly and normal scan used it parallel to the orbitomeatal line. Therefore, radiation dose in thyroid decreased in helical scan. However, a protocol in this study showed higher radiation dose than diagnostic reference level of KFDA. To obey the recommendation of KFDA, low Tube Curren and high pitch were demanded. In this study, the difference of image quality between normal scan and helical scan was not significant. Therefore, a standardized protocol of normal scan was generally used and protective gear for thyroid was needed except a special case. We studied a part of CT cases in the local area. Therefore, the result could not represent the entire cases. However, we confirmed that patient's radiation dose in some cases exceeded the recommendation and the deviation between hospitals was observed. To improve this issue, doctors of diagnostic imaging or technologists of radiology should perform CT by the optimized protocol to decrease a level of CT radiation and also reveal radiation dose for the right to know of patients. However, they had little understanding of the situation. Therefore, the effort of relevant agencies with education program for CT radiation dose, release of radiation dose from CT examination and addition of radiation dose control and open CT contents into evaluation for hospital services and certification, and also the effort of health professionals with the best protocol to realize optimized CT examination.

• Korean Journal of Head & Neck Oncology
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• v.14 no.2
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• pp.236-243
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• 1998

Objectives: Local invasion of the thyroid cancer that is invasion of the upper aerodigestive tract, neurovascular structures of the neck and superior mediastinum, is infrequent and comprises of 1-16% of well-differentiated thyroid cancer. However the proximity of the thyroid gland to these structures provides the means for an invasive cancer to gain ready access into theses structures and when invasion occurs, it is the source of significant morbidity and mortality. So locally invasive thyroid cancer should be removed as much as possible, but still much debates have been exist whether the surgical method should be radical or conservative. This study was desinged to evaluate the clinical characteristics and the surgical treatment of the locally invasive thyroid cancer. Material and Methods: At the department of otorhinolaryngology of Hallym university, 10 patients diagnosed as locally invasive thyroid cancer among the 81 patients treated for thyroid cancer between 1991 to 1997 were retrospectively evaluated. Results: Of the 10 patients, 3 patients had histories of previous surgical treatment with or without radiation or radioactive iodine therapy. The site of invasion of thyroid cancer were trachea(7 cases), recurrent laryngeal nerve(5 cases), mediastinal node(5 cases), esophagus(3cases), larynx(3cases), carotid artery(3 cases), pharynx(l case), and other sites(4 cases). The operation techniques included 1 partial laryngectomy and 1 partial cricoid resection, 2 shavings and 3 window resections of the trachea, 1 sleeve resection of the trachea with end-to-end anastomosis and 1 cricotracheoplasty for tracheal invasion, 2 shavings and 1 partial esophagectomies for esophageal invasion, and 1 wall shaving and 2 partial resections with $Gortex^{\circledR}$ tube reconstruction for carotid artery invasion, and so on. Conclusions: These data and review of literature suggest that the surgical method should be perfomed on the basis of individual condition and complete removal of all gross tumor with preservation of vital structures whenever possible will offer a good result.

• The Korean Journal of Cytopathology
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• v.12 no.1
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• pp.67-71
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• 2001

Primary malignant lymphoma of the thyroid gland is uncommon malignancies. Its fine needle aspiration cytology (FNAC) findings are rarely described in the literature. This article highlights the FNAC diagnosis of primary malignant lymphoma of the thyroid gland. A 70-year-old female presented with a rapidly enlarging thyroid mass of five months' duration. FNAC smears showed low cellularity consisting of predominantly atypical enlarged lymphoid cells admixed with a few small lymphocytes, plasma cells, and oncocytic cells. Some disrupted lymphoid cells were also present. The tumor cells infiltrated into the thyroid follicular epithelium forming lymphoepithelial lesion, The cytologic appearance showed a diffuse mixture of cell types with only a few small, mature lymphocytes and many enlaraed lymphoid cells. The enlarged lymphoid cells were atypical and pleomorphic with nuclear clefting and irregularities. Grossly, the left lobe of the thyroid was nearly replaced by a diffuse firm to soft solid mass with smooth tan fish-flesh homogeneous cut surface. Histological diagnosis was diffuse large B-cell lymphoma with areas of marginal zone B-cell lymphoma of MALT type.