Dysgerminoma, from the CureRays guide library.

Dysgerminoma is the most common cancerous ovarian germ-cell tumor, usually in teens and young women — and although it can grow quickly, it is one of the most curable cancers there is, with surgery and chemotherapy that almost always preserve the chance to have children.

What it is.

Dysgerminoma is a type of ovarian cancer that grows from the egg-producing 'germ' cells of the ovary. It is the most common malignant germ-cell tumor of the ovary and tends to appear in girls and women in their teens and twenties. It is the ovarian counterpart of a testicular seminoma, and like that tumor it is remarkably sensitive to both chemotherapy and radiation. Most dysgerminomas are found while still confined to one ovary, often as a fast-growing but still-curable mass. Even when the disease has spread, the outlook is excellent because the tumor responds so well to treatment. Because patients are usually young, doctors work hard to cure the cancer while protecting fertility, and they follow blood markers such as LDH (and sometimes beta-hCG) to track the tumor. A small share occur in people with certain underlying genetic conditions affecting the gonads, which is why karyotype testing is sometimes recommended.

How radiation treats it.

Radiation damages the DNA inside cancer cells so they can no longer divide and survive, while normal cells are better at repairing themselves. Dysgerminoma is one of the most radiation-sensitive of all cancers, so it once melted away with low doses of radiation. Today, chemotherapy has taken over because it cures the disease just as reliably while sparing the ovaries and preserving fertility — important for the young women this cancer usually affects. When radiation is used, it is given as short, painless daily sessions and leaves no radioactivity in your body, so you remain safe to be around family and children.

The ways we can treat it.

Surgery. Removing the involved ovary and tube provides the diagnosis, removes the bulk of the tumor, and is often curative on its own for early disease.

Radiation (now rarely used). Dysgerminoma is extremely radiosensitive, and radiation was once a mainstay. Today chemotherapy has largely replaced it because chemo cures the disease while better protecting fertility, so radiation is reserved for unusual situations where chemotherapy cannot be used.

Palliative radiation. Because the tumor melts away with even modest doses, a short course of radiation can quickly relieve symptoms in the rare resistant or recurrent case.

Questions we hear often.

Can I still have children after treatment? Usually yes. For most young women, surgeons remove only the affected ovary and fallopian tube and leave the uterus and other ovary in place. Most survivors who had this fertility-sparing surgery are later able to conceive. Your team will tailor the plan to your situation.

Is dysgerminoma really curable even if it has spread? Yes. Dysgerminoma is one of the most curable cancers known. It responds so well to chemotherapy that even when it has spread, the large majority of patients are cured. Stage mainly affects how much treatment you need, not whether cure is possible.

Why do I need blood tests during follow-up? Many dysgerminomas raise markers like LDH (and sometimes beta-hCG). Tracking these in the blood helps confirm that treatment is working and can flag a recurrence early, when it is easiest to treat.

This guide is informational only. It is not medical advice — please confirm anything here with your care team.