A vaginal tumor typically appears as a raised, fleshy mass, an ulcerated sore, or a flat, discolored patch on the vaginal wall. The exact appearance depends on the type of tumor, but most are some variation of these three forms. Vaginal cancer is rare, and many growths inside the vagina turn out to be benign cysts or polyps, so understanding the visual differences matters.
How Vaginal Tumors Typically Present
Vaginal tumors take one of three general forms during clinical examination. The most common is a fungating mass, which means a growth that projects outward from the vaginal wall with an irregular, sometimes cauliflower-like surface. The second is an ulcerating lesion, a sore or crater in the vaginal lining that doesn’t heal and may bleed easily when touched. The third is an annular constricting mass, a ring-like growth that narrows the vaginal canal.
Color varies. Squamous cell tumors, which account for roughly 80% of vaginal cancers, often appear pinkish-red to grayish-white because they arise from the same tissue that lines the vaginal walls. Adenocarcinomas, making up about 15% of cases, can present as raised nodular red lesions or small punctate ulcers. Some adenocarcinomas appear as gray-white solid masses. At diagnosis, these lesions average around 3.3 cm, roughly the size of a grape to a small walnut.
Where Tumors Are Most Likely to Appear
The vagina is divided into three segments: the upper third (near the cervix), the middle third (next to the bladder base), and the lower third (closer to the vaginal opening). Squamous cell carcinoma most often develops in the upper third, near the cervix. This means many vaginal tumors aren’t visible or felt without a speculum exam, which is one reason routine gynecological screening matters.
Vaginal melanoma, a much rarer type, tends to behave differently. It usually appears in the lower third of the vagina, closer to the opening, and on the front (anterior) wall. These tumors present as irregularly pigmented plaques, meaning patches of dark brown, black, or bluish discoloration that may be uneven in color. They can also form ulcerated or polypoid (stalk-like) masses. The pigmentation is often inconsistent across the lesion, with some areas darker than others.
Symptoms That Accompany Visible Changes
A visible or palpable mass is only one sign. Many vaginal tumors also cause bleeding that falls outside normal patterns: after menopause, between periods, or after sex. Unusual vaginal discharge is another common symptom. Some women notice a feeling of pressure or fullness, particularly with larger growths. In early stages, vaginal cancer often causes no symptoms at all, which is why it’s frequently discovered during a routine pelvic exam or Pap test rather than because of something the patient noticed on her own.
How Tumors Differ From Cysts and Warts
Not every lump inside the vagina is cancerous. Benign vaginal cysts are common and feel like smooth, round bumps under the skin. On ultrasound, cysts that appear uniform and fluid-filled are almost always benign. Tumors, by contrast, tend to have irregular borders, solid components, and an uneven surface texture. They may bleed on contact, while cysts generally don’t.
Genital warts caused by HPV are another source of confusion. Warts usually appear as soft, flesh-colored bumps with a slightly rough or bumpy surface, often in clusters. They’re typically painless and don’t bleed spontaneously. A cancerous growth is more likely to be firm, fixed to the surrounding tissue, irregularly shaped, and prone to bleeding. That said, the only definitive way to distinguish a benign growth from a malignant one is a biopsy, where a small tissue sample is examined under a microscope.
How Suspicious Tissue Gets Identified
During a gynecological exam, a clinician may perform a colposcopy, using a magnifying instrument to get a closer look at the vaginal and cervical tissue. A dilute acetic acid solution (essentially vinegar) is applied to the tissue and allowed to soak for one to two minutes. Abnormal cells dehydrate and turn white, a reaction called acetowhitening. The whiter and more opaque the area, the more likely it contains precancerous or cancerous cells.
An iodine-based solution is sometimes used as well. Normal vaginal tissue absorbs the iodine and turns brown, while abnormal tissue doesn’t absorb it and stays yellow. Any area that looks suspicious gets biopsied. The clinician documents the size, location, color, borders, and surface pattern of every abnormal area. A flat, mildly white lesion can sometimes mimic normal immature tissue, especially in younger women, so borderline findings are biopsied to be safe.
Who Is Most at Risk
Squamous cell vaginal cancer is most common in postmenopausal women, with a median age of 60 at diagnosis. Clear cell adenocarcinoma, a rarer subtype, shows two distinct age peaks: one between ages 17 and 37, and another between 44 and 88. The younger peak was historically linked to a medication called DES (diethylstilbestrol) that was given to pregnant women between the 1940s and 1970s, though cases still occur outside of that exposure.
Overall, vaginal cancer is very rare. The CDC classifies it among the least common gynecological cancers, noting that while all women are technically at risk, very few will ever develop it. HPV infection is the strongest risk factor for the squamous cell type, which is another reason HPV vaccination and regular screening are effective prevention tools.