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What is steroid cell tumor of the ovary?
Steroid cell tumors are a rare type of ovarian sex cord-stromal tumor made of cells that produce steroid hormones — most often male hormones (androgens), and sometimes estrogen or cortisol. Because of this hormone production, many are discovered through their effects: irregular or absent periods, acne, increased body hair or a deeper voice, or, less often, signs of excess estrogen or cortisol. They can occur across a wide age range. Most steroid cell tumors are confined to one ovary and behave in a benign or low-grade way, and removing the tumor both cures the cancer and reverses the hormone symptoms. A minority, however, are malignant and can spread, so the tumor is examined carefully for features that predict aggressive behavior (such as large size, a high rate of dividing cells, bleeding, or death of tumor tissue). Treatment is led by surgery, with additional therapy reserved for higher-risk or spread tumors.
The main types
Doctors group steroid cell tumor of the ovary by where it starts and how it behaves:
| Type | What it means, simply |
|---|---|
| Stromal luteoma | A small, benign tumor within the ovary, often producing estrogen; cured by removal. |
| Leydig cell tumor | Contains Leydig-type cells (often with characteristic crystals) and usually makes male hormones; almost always benign. |
| Steroid cell tumor, not otherwise specified (NOS) | The most common and least defined group; behavior ranges from benign to malignant, judged by size and microscopic features. About a third can behave aggressively. |
Staging, in plain terms
Steroid cell tumors use the FIGO ovarian stages to describe any spread, but because most are localized, pathology features that predict malignant behavior are emphasized alongside stage. Most are stage I when found.
| Ovarian cancer FIGO staging (with malignant-risk features) | What it generally means |
|---|---|
| Stage I | Confined to one ovary — the large majority of cases. Usually cured by surgery, with monitoring guided by the tumor's microscopic features. |
| Stage II | Spread to nearby pelvic structures. Uncommon; may prompt additional treatment. |
| Stage III | Spread to the abdominal lining or lymph nodes. Rare; treated with surgery plus systemic therapy. |
| Stage IV | Spread to distant organs. Rare; managed with combined therapy at an expert center. |
The standard of care
Steroid Cell Tumor of the Ovary is almost always treated by a team that may include a surgeon, a medical oncologist, and a radiation oncologist, combining therapies for the best result. The usual building blocks are:
Surgery
Removing the affected ovary is the main treatment and cures most tumors; it also reverses the hormone-related symptoms. Fertility-sparing surgery is possible for young women with early, low-risk tumors.
Staging surgery for higher-risk tumors
When features suggest malignant potential, more complete surgical staging is performed to check for and remove any spread.
Chemotherapy
Reserved for malignant, recurrent, or spread tumors; platinum-based regimens are typically used, though evidence is limited because the tumor is so rare.
Hormone evaluation and follow-up
Hormone levels that were high before surgery can be tracked afterward to confirm the tumor is gone and to detect any recurrence early.
How radiation treatment works
Radiation damages the DNA inside cancer cells so they can no longer divide, while healthy cells recover more effectively. For ovarian steroid cell tumors, surgery is the main treatment and radiation plays only a limited, selective role — for instance, to control an isolated recurrence or to relieve symptoms. When 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 main ways radiation is delivered for steroid cell tumor of the ovary:
Radiation (selective)
Radiation is not a standard treatment; it is occasionally used to control a localized recurrence or to relieve symptoms when surgery and chemotherapy are insufficient.
Stereotactic / focused radiation
Precisely targeted high-dose radiation can treat a single area of recurrent disease while sparing surrounding organs.
Palliative radiation
Short courses can ease pain or other symptoms in the uncommon setting of advanced, resistant disease.
Latest studies shaping care
Care keeps improving — often toward getting the same excellent results with less burden on patients. A few developments:
Predicting malignant behavior: Pathology studies have refined the features — large size, frequent cell division, bleeding, and tumor-cell death — that flag steroid cell tumors NOS as more likely to behave aggressively, helping target follow-up and treatment.[1]
Gynecologic pathology reviews (2021–2024)
Surgery cures most tumors: Case series confirm excellent long-term outcomes after surgery alone for localized, low-risk steroid cell tumors, including fertility-sparing surgery in young women.[2]
Rare ovarian tumor outcome series (2022–2025)
Hormone markers track the disease: Because these tumors secrete measurable hormones, tracking those levels after surgery provides a sensitive way to confirm cure and catch recurrence early.[3]
Endocrine oncology case reports (2023–2025)
Common questions
Is my tumor cancerous? Most ovarian steroid cell tumors are benign or low-grade and are cured by surgery. A minority can behave aggressively, which is why the removed tumor is examined closely for features that predict its behavior. Your team will explain what your pathology shows.
Will my hormone symptoms go away after surgery? Usually yes. Symptoms caused by the tumor's hormone production — such as acne, extra hair, or changes in periods — typically improve once the tumor is removed, and hormone levels return toward normal.
Can I still have children after treatment? Often yes. For young women with an early, low-risk tumor confined to one ovary, surgeons can usually remove only the affected ovary, preserving the uterus and the other ovary and protecting fertility.
References
Numbered sources for the studies cited above. Links open the primary publication on PubMed or the publisher’s site.