Growing teratoma syndrome is a rare condition among patients with nonseminomatous germ cell tumors who present with enlarging metastatic masses during appropriate systemic chemotherapy and normalized serum markers. Retroperitoneal residual masses are a common finding after chemotherapy for the nonseminomatous tumors of the testis. These might contain mature teratoma, fibrotic tissue, or tumor. ...

A teratoma is the most common germ cell tumor in children; however, a gastric teratoma is very rare. An immature gastric teratoma has malignant potential; therefore, it should be removed surgically and followed up routinely to assess for recurrence by performing imaging studies and estimating serum alpha-fetoprotein (AFP) level. We describe the case of a 2-day-old male neonate with abdominal di...

Benign cystic teratomas of the lung are extremely rare. We diagnosed such case in 22 years old male suffering from heaviness left side chest for 2 with occasional cough expectoration 1 year. Patient suffered typical symptom white hair expectoration. Diagnosis was confirmed on computed tomography thorax and Fine needle aspiration cytology. Teratoma located anterior segment upper lobe treated lob...

Teratoma tumor formation is an essential criterion in determining the pluripotency of human pluripotent stem cells. However, currently there is no consistent protocol for assessment of teratoma forming ability. Here we present detailed characterization of a teratoma assay that is based on subcutaneous co-transplantation of defined numbers of undifferentiated human embryonic stem cells (hESCs) w...

Mature cystic teratoma is one of the most common kinds of ovarian tumor, and immature teratoma is a rare tumor, representing less than 1% of all ovarian teratomas. Although there are some reports about familial occurrences of ovarian tumors, literature concerning the clinical cases of monozygotic twins is rare. We report the 5-year clinical courses of a 12-year-old Japanese girl with a recurren...

Metastatic mature teratoma is often present in postchemotherapy surgical specimens of lymph nodes from patients with pathological stage II or III testicular germ cell tumors. The stromal cells in these lesions have generally been considered "fibrosis" secondary to the chemotherapy and the necrosis it causes, although the frequent cytological atypia of the stromal cells suggests that they may be...

Massive hemoptysis is described in many disease processes. However, a mediastinal teratoma is rarely considered in a patient presenting with massive hemoptysis. Since a mediastinal teratoma has no specific symptoms, its definitive diagnosis is difficult before surgical intervention. Flexible bronchoscopy can be diagnostic in cases of a mediastinal teratoma with involvement of the bronchial tree...

UNLABELLED Teratoma is a rare cause of thyrotoxicosis. Among the different types of teratoma, struma ovarii is the main type which contains thyroid tissue. There is no evidence in the literature that would indicate mediasternal teratoma would also lead to thyrotoxicosis or thyroid storm. Herein we report a 37-year-old woman who suffered from palpitation. Her chest X-ray showed a mass lesion at ...

Teratoma components of germ cell tumors (GCTs) are clinically challenging due to their uniform resistance toward conventional anticancer treatment; for example, chemotherapy and radiotherapy. Approximately one in three non-seminoma patients undergoing residual mass resection have teratoma specimens, whereas viable GCT can be found 10–20% secondary resection.1 Satoshi et al. reported on a series...

Teratoma is a rare tumor, containing structures originating from all three germinal layers. The most frequent location of teratoma is the gonads. Orbital teratoma is extremely rare. In 1969, Jensen reported that only 40 cases of orbital teratoma existed in the world. We describe a rare case of orbital teratoma in a 15-day girl who presented with marked proptosis of the left eye. The eyeball was...