Somatic malignancy arising from presacral or retroperitoneal primary teratoma is extremely rare. We report the case of a 37-year-old male patient with adenocarcinoma of respiratory type arising from primary presacral teratoma, but which first presented as anal fistula and rectal adenocarcinoma. The two tumors show the same morphology and immunophenotype (CK7-CK20+CDx2+). Malignant adenocarcinom...

We report a case of a posterior mediastinal mature cystic teratoma with rupture secondary to blunt chest trauma in a 20-year-old male involved in a motor-vehicle accident. Initial treatment was guided by Advanced Trauma Life Support and a tube thoracostomy was performed for presumed hemothorax. The heterogeneous collection within the thoracic cavity was discovered to be the result of a ruptured...

An extremely rare case of anterior mediastinal mature teratoma with almost complete gastrointestinal and bronchial walls is described. A 65-year-old woman presented with left precordial pain. Chest computed tomography showed a huge anterior mediastinal tumor, 15 cm × 21 cm, occupying the left thoracic cavity. Post-resection histopathological examination confirmed the diagnosis of mature teratom...

Received: 2009­08­31; Accepted: 2010­02­08 Primary malignant ovarian melanoma, which is primarily transformed from ovarian mature teratoma, is rare [1,2] . Each component of ovarian mature teratoma can be transformed to malignant tumor, with the squamous carcinoma as the most common type accounting for about 80% , followed by adenocarcinoma , and those transformed to melanoma are rare [3] . We ...

It is usually assumed that in the case of sacrococcygeal teratoma the concentration of alphafetoprotein in the amniotic fluid is increased. In the case reported here the AFP concentration in the amniotic fluid was found to be normal in spite of a large teratoma not covered with skin. Possible reasons for this are discussed and the histological characteristics of the tumour are reported. It is e...

The morphological features of a retroperitoneal teratoma in a 10-month-old girl are reported. Unlike the usual pattern of the teratoma, this tumor was composed predominantly of nephroblastomatous tissue. Histologically, glomeruloid and tubular structures were identified in nests of undifferentiated blastemal elements. Hyaline cartilage, adipose tissue, glial tissue and glands lined by mucin-sec...

Cystic trophoblastic tumor (CTT) is a rare testicular germ cell tumor (GCT) predominantly seen in post-chemotherapy patients. It is prognostically similar to teratoma and requires no additional chemotherapy in the absence of a nonteratomatous GCT component. We report a case of metastatic CTT in a patient with primary testicular teratoma without prior chemotherapy. Retroperitoneal lymph node met...

Twenty cases of extrarenal renin-secreting tumors have been reported, but this is the first case of a renin-producing teratoma. The patient was a 17-year-old African American girl who presented with hypertension and hypokalemia, and who was documented to have a plasma aldosterone-to-renin activity ratio consistent with secondary aldosteronism. Computed tomography demonstrated a pelvic tumor sus...

INTRODUCTION The discovery of a mature teratoma (dermoid cyst) of the ovary during ovarian stimulation is not a rare event. Conversely, we could not find any reported cases of immature teratoma in such a situation. Clinical and ultrasound arguments for this immature form are scarcely or poorly evaluated. CASE PRESENTATION We describe the case of a 31-year-old Caucasian woman with primary infe...

(This section is meant for residents to check their understanding regarding a particular topic) QUESTIONS 1. What is the incidence of sacrococcygeal teratoma? 2. What factors are considered to modify the biologic behaviour of sacrococcygeal teratomas? 3. Discuss antenatal management of sacrococcygeal teratoma? 4. How a newborn with sacrococcygeal teratoma should be worked up? 5. Discuss surgica...