• Clinical and Experimental Pediatrics
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• v.49 no.9
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• pp.1005-1009
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• 2006

A rare case is described of an intrathyroidal branchial cleft-like cyst in neonate. The patient was a newborn girl with a mass in the left lateral neck. The ultrasonography and computed tomography revealed a cystic lesion in the left thyroid. The lesion was enucleated surgically from the thyroid. Histologically, the cyst was lined by squamous or columnar epithelium and contained inflammatory cell infiltraion, thyroid and parathyroid tissue. The patient has been doing well without any evidence of thyroid dysfunction for 15 months.

• Tuberculosis and Respiratory Diseases
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• v.42 no.6
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• pp.947-950
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• 1995

We have experienced a case of pulmonary adenocarcinoma looked like cavitary lesion of pulmonary tuberculosis in 49-year-old male patient. He has taken antituberculous medication for 5 months under the impression of pulmonary tuberculosis with cavity at local hospital. The cavitary lesion was changed nodular mass on follow-up chest X-ray. Transthoracic fine needle aspiration was done and cytologic specimen suggested squamous cell carcinoma. Right middle lobectomy was performed. The nodular mass, which was confirmed as adenocarcinoma on microscopic examination, had central cavity filled with hemorrhage.

• Journal of Veterinary Clinics
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• v.35 no.3
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• pp.107-110
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• 2018

A 5-year-old Thoroughbred race horse was presented to Busan Korea Racing Authority equine hospital with a 3-year history of a slow-growing left rostral maxillary mass. The location and progressive growth of the mass eventually resulted in poor food prehension, quidding and mouth bit placement. The mass was solitary and hard, and covered by normal smooth oral mucosa. Radiographic examination of the maxillae showed a flocculated and mixed radiolucent lesion protruding outward and displacing the 202 and 203 teeth caudally. The 202 tooth was in normal size and the 203 tooth was hypoplastic on radiography. Under general anesthesia, a partial surgical resection of the mass was performed to minimize functional loss and facilitate prompt return to track. After surgery, there was improvement in food intake, mouth bit placement, and cosmetic appearance. Histopathological examination determined the resected maxillay mass to be an ossifying fibroma. However, there was continued growth of remnant mass in the maxilla. Equine ossifying fibroma is a rare condition and primarily affects the rostral mandible, and less commonly, the maxillae. In this case, the lesion was slow-growing, and caused cosmetic and functional impairments, including poor food intake and reduced trainability. Surgical resection was performed, but the effect of treatment was limited due to advanced size / stage of the tumor. Early dental care is suggested for horse owners to prevent belated identification and improve successful treatment of oral disorders like ossifying fibroma.

• Investigative Magnetic Resonance Imaging
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• v.20 no.4
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• pp.259-263
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• 2016

Primary diffuse large B-cell lymphoma of the seminal vesicle is an extremely rare disorder, with only two cases reported in the English literature. Here, we present imaging findings of a case of primary diffuse large B-cell lymphoma of the seminal vesicle. On transrectal ultrasonography, the mass presented as a 3.0-cm-sized heterogeneous, hypoechoic lesion in the right seminal vesicle. Computed tomography (CT) revealed a mass with rim-like enhancement in the right seminal vesicle. On magnetic resonance imaging (MRI), the tumor showed iso-signal intensity on T1-weighted images and heterogeneously intermediate-high signal intensity on T2-weighted images. The tumor showed rim-like and progressive enhancement with non-enhancing portion on dynamic scanning. Diffusion restriction was observed in the mass. On fluorodeoxyglucose positron emission tomography-computed tomography (FDG PET/CT) imaging, a high standardized uptake value (maxSUV, 23.5) by the tumor was noted exclusively in the right seminal vesicle.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.23 no.2
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• pp.133-136
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• 2012

Hamartoma is benign pathologic lesion that looks like a neoplasm. But actually hamartoma is derived from congenital developmental errors of mature tissue. That is a focal overgrowth of normal tissue components. Hamartomas have been reported as arising anywhere in the body, but rarely has it been found in the head and neck region. Above all, laryngeal hamartoma has been described few times. We report an unusual case of hamartoma located in the larynx. Epiglottis mass was found incidentally by gastrofibroscopic examination. After the mass was excised by $CO_2$ laser, pathologic diagnosis has confirmed the mass as hamartoma.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.1
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• pp.195-198
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• 2014

Aim: To evaluate precancerous lesions such as hyperplasia and endometrial polyps in obese postmenopausal women. Materials and Methods: Women who were referred with abnormal uterine bleeding in postmenopausal period or the presence of endometrial cells on cervical cytology in our department were investigated. Anthropometric measurements such as height, weight, body mass index, waist/hip ratio and endometrial thickness were compared between a precancerous lesion (hyperplasia and endometrial polyp) group and a pathologically normal group. Results: We detected statistically significant thickening of endometrium in patients with precancerous lesions. Moreover patients with precancerous lesions had higher body mass index than the pathologically normal group. Conclusions: We found elevated precancerous lesion rates in overweight and obese women in the postmenopausal period, of interest given that the prevalence of obesity is increasing in most parts of the world. Although screening for endometrial cancer is not recommended for the general population, in high-risk populations like obese postmenopausal women, it may be very important.

• The Korean Journal of Cytopathology
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• v.4 no.1
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• pp.52-56
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• 1993

Proliferative fasciitis is a benign pseudosarcomatous mesenchymal lesion occurring in the subcutis. The lesion occurs clinically as a tumorous mass that develops within a rather short time in elderly patients. We recently experiecened a case of fine needle aspiration cytology of proliferative fasciitis in the left anterior chest wall of a 72 year-old male patient. The smear revealed two types of cells. One was the large and mostly oval cell with one or two nuclei lying at the periphery of the cell body and abundant basophilic cytoplasm like the ganglion cell. The nuclei were round to oval, had vesicular chromatin and contained prominent nucleoli. The other was the spindle shaped fibroblast with an oval nucleus. The differential diagnosis includes a true tumor such as ganglioneuroma, rhabdomyosarcoma, and liposarcoma and therefore fine needle aspiration cytology is very much indicated in order to exclude these possibilities.

• The Journal of the Korean dental association
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• v.41 no.3 s.406
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• pp.190-196
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• 2003

Osteoblastoma is an uncommon lesion of bone that occurred in jaw bone. The etiology of the Osteoblastoma is still undiscovered. The most frequent symptom is consistent pain which is often severe, and localized swelling and bone expansion mat occur. We experienced a case of osteo-blastoma which occurred on the lingual surface of mandibular body. It resembled tours mandibularis clinically, alveolar abscess radiologically. Biopsy was done to evaluable the tours-like bony mass. The results of excisional biopsy demonstrated an osteoblastoma. The symptoms are subsided and no signs related with recurrence have been noted. Our experience and many literatures demonstrated that Osteoblastoma must be included in differential diagnosis of bone-producing lesion.

• The Korean Journal of Cytopathology
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• v.18 no.1
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• pp.69-73
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• 2007

Mammary carcinoma with osteoclast-like giant cells is an unusual neoplasm characterized by giant cells, mononuclear stromal cells, and hemorrhage accompanying a low grade carcinoma. We present the cytological findings in a case of invasive ductal carcinoma with osteoclast-like giant cells that was initially confused with a fibroadenoma, due to its well-demarcated and soft mass and the young age of the patient. A 28-year-old female presented with a 4.5 cm, well demarcated, soft and nontender mass in the right breast. Fine needle aspiration cytology (FNAC) showed a combination of low grade malignant epithelial cell clusters and osteoclast-like giant cells. The atypical epithelial cells were present in cohesive sheets and clusters. Osteoclast-like giant cells and bland-looking mononuclear cells were scattered. An histological examination revealed the presence of an invasive ductal carcinoma with osteoclast-like giant cells. We report here the cytological findings of this rare carcinoma in a very young woman. The minimal atypia of the epithelial cells and its soft consistency may lead to a false negative diagnosis in a young woman. The recognition that osteoclastlike giant cells are rarely present in a low grade carcinoma, but not in benign lesion, can assist the physician in making a correct diagnosis.

• Journal of Korean Neurosurgical Society
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• v.42 no.3
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• pp.216-219
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• 2007

Lymphocytic hypophysitis is a clinically rare disease, and it has been known to be an autoimmune disease which mainly affects pregnant women at the end of gestation or right after delivery. The authors experienced a case of lymphocytic hypophysitis in a 29-year-old pregnant woman with rapid progressing visual disturbance. Sella MRI showed a mass-like lesion of hypophysis and hypertrophy of pituitary stalk with evidences of hypopituitarism. Cesarean section was done and then TSA was performed. The pathologic diagnosis was lymphocytic hypophysitis. After TSA, visual acuity was improved and visual field defect was recovered. She was given thyroid hormone replacement therapy because of transient partial hypopituitarism for 6 months after surgery. One must consider the probability of lymphocytic hypophysitis, if there are alteration of visual acuity and visual field defect which aggravate rapidly during pregnancy due to mass effect, decreased serum hormonal levels shown in hypopituitarism and sella MRI findings of hypertrophy of pituitary stalk and enlargement of pituitary gland.