A case of teratoma in a male patient aged 53 years old at the liver left lobe, hospitalized 25 November 2002 at The Hospital 198 was persented. It was a special form of mature teratoma of dermoid cyst. Macroscopically, it was a cyst of large size with thick fibroid shell, containing fat fluid, caseinous matter, hair, cartilaginous bone and even 3 molar teeth. Microscopically, it was a lining of cells of keratinoid epithelial scale tissue in the wall. Under the epithelial cover there was a conjunctive tissue inserted by sebacenous tissues, sweat gland tissues, hair alveoli and vessels with thick fibrous wall.
Teratoma ; Liver ; Diagnosis ; Pathology ; History

The benign teratoma is usually slow growing tumor, but we expirienced a case of primary huge mediastinal benign teratoma that had grown very rapidly, maximally during 3 years. The 14-year-old female patient was admitted to our hospital because of abnormal chest X-ray that showed 10x10cm sized well definded mass with multiple calcificactions. but the mass was not present in chest X-ray perfomed on 3 years prior to admission. Under the diagnosis of teratoma, complete surgical resection was done by the left thoracotomy. The result of pathology was benign teratoma.
Adolescent ; Diagnosis ; Female ; Humans ; Mediastinal Neoplasms ; Pathology ; Teratoma* ; Thoracotomy ; Thorax

We report a partial fetus-like structure (homunculus) in benign ovarian mature cystic teratoma removed from a 23-yr-old female. The cyst displayed various tissues derived from the three germ layers. The homunculus had a distinguished fetal cranial structure with one upper extremity. A partially developed osteocartilagenous skeleton was identified in the cranial structure of the homunculus. Intracranial structures such as cerebral cortex, retinal pigment, and leptomeninges were extruded from the partially disrupted calvarium.
Adult ; Female ; Human ; Ovarian Cysts/*pathology ; Ovarian Neoplasms/*pathology ; Pregnancy ; Teratoma/*diagnosis/*pathology

Diagnosis, Differential ; Female ; Humans ; Infant, Newborn ; Nasopharyngeal Neoplasms ; pathology ; surgery ; Polyps ; pathology ; surgery ; Teratoma ; pathology

Adult ; Chondroblastoma ; pathology ; Chondroma ; pathology ; surgery ; Diagnosis, Differential ; Female ; Humans ; Ovarian Neoplasms ; pathology ; surgery ; Ovary ; pathology ; Teratoma ; pathology

Struma ovarii, the most common monodennal teratoma of the ovary, causes diverse problems in differential diagnosis. The literature on the pathology of struma ovarii has focused principally on the problem of formulating criteria of malignancy. In contrast, unusual gross and microscopic features of struma ovarii and its resultant problems in differential diagnosis have received relatively little attention. We report an ovarian teratoma which was almost entirely cystic, causing the diagnosis of struma to be overlooked. The removed ovarian tumor showed all the features of adenomatous goiter of the thyroid gland. The lining epithelium of the cysts was frequently flattened, and the follicles in the cyst wall were few and atrophic. The patient was a 58-year-old woman who was found to have an ovarian tumor by routine monographic examination
Diagnosis ; Diagnosis, Differential ; Epithelium ; Female ; Goiter* ; Humans ; Middle Aged ; Ovary ; Pathology ; Struma Ovarii* ; Teratoma ; Thyroid Gland*

Mature teratoma is the most common germ cell tumor of the ovary. The tumor is essentially a benign neoplasm and surgical resection of the tumor is the treatment of choice. Recurrence with colorectal involvement after surgical removal of the primary lesion is exceedingly rare and has not been reported in Korea. We present a 43-year-old patient with a rectal mass who had already undergone left oophorectomy due to mature cystic teratoma and right oophorectomy due to hemorrhagic corpus luteum. The rectal mass was composed of a mature teratoma tissue. We postulate that leakage of the tumor elements from the cyst wall led to peritoneal tumor implantation and invasion to the rectal wall.
Adult ; Female ; Humans ; Ovarian Neoplasms/*pathology ; Rectal Neoplasms/diagnosis/*secondary ; Teratoma/diagnosis/*secondary

No abstract available.
Diabetes Insipidus, Neurogenic/*pathology ; *Magnetic Resonance Imaging ; Pituitary Neoplasms/*diagnosis ; Teratoma/*diagnosis

OBJECTIVE: To study the clinicopathologic features, immunophenotype, diagnosis and differential diagnosis of Sinonasal teratocarcinosarcoma (SNTCS). METHOD: The clinical findings, morphologic features and immunohistochemical markers in one case of SNTCS were studied, and the relevant literatures were reviewed. RESULT: The Tumor tissue is composed of three layers, with mature and immature squamous epithelium nests, neural epithelial cells and olfactory neuroblastoma-like cells derived of ectoderm; Sarcomatoid components and bone tissue derived of mesoderm; The glandular and tubular structures part of which is adenocarcinoma and respiratory epithelium derived of endoderm; The fetal clear cell squamous epithelium is typical. In addition, diffuse large cytoplasm-with high light and cytoplasm with dark light has no obviously boundery. Immunohistochemical staining showed immune markers of different germ layers corresponding, squamous epithelium, glandular epithelium and respiratory epithelium were positive for CK and EMA, neural epithelial cells and olfactory neuroblastoma-like cells were positive for S-100, NSE and Syn, sarcomatoid area was positive for Vim, light dye area was positive for Vim, CD99 and CK, dark area was positive for NSE and GFAP. CONCLUSION SNTCS is a rare malignant tumor with the features of teratoma and carcinosarcoma, its histopathological and immunohistochemical features were typical, should be more drawn and sliced to avoid misdiagnosis and missed diagnosis.
Adenocarcinoma ; Carcinosarcoma ; diagnosis ; immunology ; pathology ; Diagnosis, Differential ; Esthesioneuroblastoma, Olfactory ; diagnosis ; immunology ; pathology ; Humans ; Nasal Cavity ; Nose Neoplasms ; diagnosis ; immunology ; pathology ; Teratoma ; diagnosis ; immunology ; pathology

PURPOSE: It has generally been accepted that the most common primary testicular tumor in the pediatric population is yolk sac tumor. Recently, there have been some reports that teratoma is the most common tumor in this age group. The histopathological distribution and clinical behavior of primary pediatric testicular tumors from three hospitals were retrospectively reviewed. MATERIALS AND METHODS: A retrospective review was performed on 30 pediatric patients, who had been treated for primary testicular tumors, at three hospitals. The records of the patients were reviewed with respect to age at diagnosis, affected sites, presentation, operation, pathology and prognosis. The mean age of the patients was 68.3 months (1-234). RESULTS: The most common presentation was a painless scrotal mass (86.7%). In patients younger than 15 years, the most common testicular tumor was teratoma at one hospital and yolk sac tumor at the other two hospitals. Totally, the most common testicular tumor was teratoma (52%), followed by yolk sac tumor (40%). In 5 patients, aged 15-20 years, the pathological distribution of the testicular tumor was the same as that observed in adults. No patients had had a recurrence after a mean follow- up of 30.6 months (3-109). CONCLUSIONS: Our results suggest that the prognosis for children with testicular tumors is favorable. The most common primary prepubertal testis tumor is teratoma, followed by yolk sac tumor, although yolk sac tumor was the most common tumor at two of the hospitals in this study. A large prospective multi-center study will be required to determine the pathological distribution of pediatric testicular tumors.
Adult ; Child* ; Diagnosis ; Endodermal Sinus Tumor ; Humans ; Pathology ; Prognosis ; Recurrence ; Retrospective Studies ; Teratoma ; Testicular Neoplasms* ; Testis