Primary mediastinal nonseminomatous germ cell tumor
Primary mediastinal nonseminomatous germ-cell tumor is a germ-cell cancer that begins in the chest between the lungs. It is distinct from a lymphoma and from a testicular tumor that has spread to the chest.
Other names and abbreviations
PMNSGCT, PMGCT, mediastinal nonseminoma, primary mediastinal germ cell tumor, Primary mediastinal nonseminoma, mediastinal nonseminomatous germ cell tumour
In short
- This is a germ cell cancer that starts in the chest between the lungs, and it is not a lymphoma or a testicular tumor that has spread there.
- Treatment usually includes cisplatin-based chemotherapy and, when suitable, surgery to remove tumor that remains, with specialist review if the cancer comes back.
- Some patients, especially at relapse, may get high-dose chemotherapy followed by a return of their own stem cells, so this path does not use a donor.
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Where transplant fits
Very strong drug treatment given in large doses, often to kill cancer cells. It also destroys the bone marrow and can cause other serious side effects. A stem cell transplant usually follows to rebuild the marrow. with Coming from the patient's own body. In an autologous transplant, the patient's own stem cells are collected and stored, then given back after high-dose treatment. It does not use a donor. may be used in selected patients, especially at When a disease comes back after a period of getting better. Relapsed disease has returned after treatment helped for a time.; some first-line approaches are also studied or considered in expert centers. It uses the patient’s cells. Evidence from all germ-cell tumors should not be assumed to apply equally to this subtype.
Treatment depends on the exact diagnosis, disease stage, prior treatment and the person’s health.
Key facts
- Who it affects
- This tumor mainly affects adolescent and young adult males.
- Usual treatment
- Treatment usually includes cisplatin-based chemotherapy and surgery for suitable residual disease. Relapse needs specialist assessment because the mediastinal nonseminomatous site carries different risks from many testicular germ-cell tumors.
- Cells used in a transplant
- The patient’s own collected blood-forming cells for autologous stem cell rescue, when that procedure is appropriate.
- Where a donor fits
- Limited transplant role
Support for patients and families
These independent organizations offer information and support. JBF is not affiliated with them.
- Cancer Support Community Toll-free cancer helpline and plain-language information on germ cell tumors, including those that start outside the testes or ovaries.United States
- The Robin Cancer Trust UK charity for testicular, ovarian and germ cell cancers offering free materials and community for newly diagnosed young people.United Kingdom
Questions to bring to your care team
- What is the exact name of the diagnosis or subtype, and what does it mean for treatment?
- What is the goal of each treatment you are suggesting?
- What would make a transplant worth considering later on?
- Are there clinical trials that might fit?
- Where can our family find support during treatment?
Sources and further reading
- Extragonadal Germ Cell Tumors Treatment (PDQ), Health Professional Version
NCI, Accessed 2026-09-05 - Indications for haematopoietic cell transplantation and CAR-T: 2025 EBMT practice recommendations
EBMT / Bone Marrow Transplantation, Accessed 2026-09-05 - Stem Cell and Bone Marrow Transplants for Cancer
NCI, Accessed 2026-09-05
Other patients are waiting for a match.
Most people with primary mediastinal nonseminomatous germ cell tumor are treated without a registry donor. Many people with other blood cancers and blood disorders need a donor who is a stranger.
Join the registry
JBF points you to the official registry that serves your country. It explains who can join and what donation involves.
Help a family run a drive
If someone you love needs a donor, a registration drive can add many potential donors at once, for them and for others.
Support this work
Gifts to the Jada Bascom Foundation support donor-awareness education like this guide, community outreach, drive planning and referrals to official registries.
