Overview
Extragonadal germ cell tumors (EGCTs) are rare neoplasms that arise from germ cells located outside the gonads (ovaries and testes). These tumors develop along the body's midline, most commonly in the mediastinum (chest), retroperitoneum (back of the abdomen), sacrococcygeal region (base of the spine), and the pineal or suprasellar regions of the brain. They are thought to originate from primordial germ cells that failed to migrate properly to the gonads during embryonic development. EGCTs can be benign (such as mature teratomas) or malignant, and malignant subtypes include seminomas (also called germinomas when in the brain), yolk sac tumors, embryonal carcinomas, choriocarcinomas, and mixed germ cell tumors. Symptoms depend on the tumor's location and size. Mediastinal EGCTs may cause chest pain, cough, shortness of breath, and superior vena cava syndrome. Retroperitoneal tumors can present with abdominal pain, a palpable mass, or back pain. Intracranial EGCTs may cause headaches, visual disturbances, hormonal abnormalities (such as diabetes insipidus or precocious puberty), and signs of increased intracranial pressure. Some tumors produce elevated serum markers, including alpha-fetoprotein (AFP) and beta-human chorionic gonadotropin (beta-hCG), which are important for diagnosis and monitoring. Treatment typically involves a combination of cisplatin-based chemotherapy and surgical resection, depending on the tumor type, location, and stage. Seminomatous EGCTs are generally highly sensitive to chemotherapy and radiation therapy, while nonseminomatous tumors often require multimodal therapy including surgery. Mediastinal nonseminomatous germ cell tumors carry a poorer prognosis compared to other sites. Intracranial germinomas are often treated with chemotherapy and/or radiation with favorable outcomes. Early diagnosis and referral to specialized centers are critical for optimal management.
Sporadic
Usually appears on its own, not inherited from a parent
Variable
Can begin at different ages, from infancy through adulthood
FDA & Trial Timeline
3 eventsN.N. Petrov National Medical Research Center of Oncology — PHASE2
Children's Oncology Group — PHASE3
Alliance for Clinical Trials in Oncology — PHASE3
Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.
Treatments
No FDA-approved treatments are currently listed for Extragonadal germ cell tumor.
3 clinical trialsare actively recruiting — trials can provide access to cutting-edge therapies.
View clinical trials →Rare Disease Specialist
Treatment Centers
8 centersArkansas Children's Hospital
📍 Little Rock, Arkansas
Banner University Medical Center - Tucson
📍 Tucson, Arizona
University of Arkansas for Medical Sciences
📍 Little Rock, Arkansas
Kingman Regional Medical Center
📍 Kingman, Arizona
CHI Saint Vincent Cancer Center Hot Springs
📍 Hot Springs, Arkansas
University of Arizona Cancer Center-North Campus
📍 Tucson, Arizona
Cancer Center at Saint Joseph's
📍 Phoenix, Arizona
Harvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
Travel Grants
No travel grants are currently matched to Extragonadal germ cell tumor.
Community
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Start the conversation →Latest news about Extragonadal germ cell tumor
Disease timeline:
New recruiting trial: High-dose Chemotherapy as Second-line Drug Therapy for Relapsed Germ Cell Tumors
A new clinical trial is recruiting patients for Extragonadal germ cell tumor
New recruiting trial: Active Surveillance, Bleomycin, Etoposide, Carboplatin or Cisplatin in Treating Pediatric and Adult Patients With Germ Cell Tumors
A new clinical trial is recruiting patients for Extragonadal germ cell tumor
New trial: Active Surveillance, Bleomycin, Etoposide, Carboplatin or Cisplatin in Treating Pediatric and Adult
Phase PHASE3 trial recruiting. Best Practice
Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Common questions about Extragonadal germ cell tumor
What is Extragonadal germ cell tumor?
Extragonadal germ cell tumors (EGCTs) are rare neoplasms that arise from germ cells located outside the gonads (ovaries and testes). These tumors develop along the body's midline, most commonly in the mediastinum (chest), retroperitoneum (back of the abdomen), sacrococcygeal region (base of the spine), and the pineal or suprasellar regions of the brain. They are thought to originate from primordial germ cells that failed to migrate properly to the gonads during embryonic development. EGCTs can be benign (such as mature teratomas) or malignant, and malignant subtypes include seminomas (also cal
How is Extragonadal germ cell tumor inherited?
Extragonadal germ cell tumor follows a sporadic inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
Are there clinical trials for Extragonadal germ cell tumor?
Yes — 3 recruiting clinical trials are currently listed for Extragonadal germ cell tumor on UniteRare. See the clinical trials section on this page for phase, sponsor, and site details sourced from ClinicalTrials.gov.
Which specialists treat Extragonadal germ cell tumor?
25 specialists and care centers treating Extragonadal germ cell tumor are listed on UniteRare, sourced from ClinicalTrials.gov principal investigators, published research, and the NPPES NPI registry.