Paraovarian Cysts: Causes, Symptoms & Treatment

What is a Paraovarian Cyst?

A paraovarian cyst is a fluid-filled sac that grows beside the ovary rather than inside it. The word “para” means “near,” which explains why a paraovarian cyst means a cyst that develops close to the ovary and fallopian tube. These cysts originate from the tissues that surround the ovary and not from the ovary itself.

They are also known as paratubal cysts and are usually found within the broad ligament, which is the sheet-like structure that holds the reproductive organs in place. A report may mention a left paraovarian cyst or a right paraovarian cyst, simply indicating the side where the cyst is located. The side does not change the seriousness of the condition.

How Common Are Paraovarian Cysts?

Paraovarian cysts are not rare. Research suggests that they make up about 5 to 20% of all adnexal masses, which refers to growths found around the ovaries and fallopian tubes. Many people do not even realise they have one because most paraovarian simple cysts do not cause symptoms, especially when they are small.

They can occur at any age, including adolescence, but are most commonly detected in women between 20 and 40 years of age.

Symptoms of Paraovarian Cysts

A large number of paraovarian cysts do not lead to any discomfort. People often discover them accidentally during an ultrasound done for another reason. Symptoms usually appear when the cyst becomes larger, presses on nearby organs, or twists.

Common symptoms include:

• A dull or persistent pain in the lower abdomen
• Feeling of pressure or heaviness in the pelvis
• Bloating or a sense of fullness
• Discomfort during sexual intercourse
• Frequent urination if the cyst presses against the bladder
• Sudden sharp pain, which may suggest torsion (twisting)

A very sudden and intense pain should always be taken seriously. It can signal rupture or torsion of the cyst, both of which require urgent medical attention.

Causes of Paraovarian Cysts

Paraovarian cysts usually develop due to embryological factors. This means that the tissues that later form into reproductive organs may leave behind small remnants that can grow into cysts at some point in life.

The possible causes include:

• Remnants of Müllerian or Wolffian ducts. These ducts are part of the reproductive system during fetal development. If remnants remain, they can later form cysts.
• Fluid retention in the tissues near the ovary or fallopian tube.
• Hormonal influences. Although hormones are not as strongly linked to paraovarian cysts as ovarian cysts, hormonal changes may occasionally play a role in the growth of a cyst.

It is important to note that para-ovarian cysts are not caused by stress, sexual activity, lifestyle habits, infections, or anything you did or did not do.

How Paraovarian Cysts Are Detected?

Most paraovarian cysts are diagnosed during routine imaging tests. The main tool used is a pelvic ultrasound. A paraovarian cyst ultrasound helps doctors differentiate between ovarian and paraovarian structures. During the scan, the doctor can observe where the cyst is located in relation to the ovary.

A typical paraovarian simple cyst appears as:

• A clear, fluid-filled sac
• Located close to but separate from the ovary
• Having smooth and thin walls
• Not containing any solid areas or unusual growths

Sometimes a transvaginal ultrasound provides more detailed information. In rare cases where the cyst looks complex or unusually large, a CT scan or MRI may be recommended for better clarity.

Treatment of Paraovarian Cysts

The treatment approach depends entirely on the size of the cyst, the symptoms it causes, and the appearance of the cyst on imaging.

Observation

Small cysts that do not cause any discomfort usually do not need immediate treatment. Doctors commonly recommend monitoring the cyst over time. This involves repeat ultrasounds every few months to ensure that it is not growing or causing problems.

Medication

There is no specific medication that can shrink or dissolve a paraovarian cyst. Pain relief medicines may be used for mild discomfort.

Surgical Removal

Surgery is suggested when:

• The cyst is large (generally more than 5 to 7 centimetres)
• The cyst is causing ongoing pain
• The doctor suspects torsion
• The cyst has complex features on imaging
• The cyst continues to grow over time

Laparoscopic surgery is the most common method used. It involves small cuts, quicker recovery, and minimal scarring. The aim is to remove the cyst while preserving the ovary and fallopian tube.

Difference Between Ovarian Cysts and Paraovarian Cysts

Even though the two conditions may sound similar, there are important differences that help doctors identify them accurately.

Feature	Ovarian Cyst	Paraovarian Cyst
Origin	Develops within the ovary	Develops beside the ovary
Cause	Usually hormonal or due to ovulation	Usually due to developmental tissue remnants
Impact on fertility	May affect fertility if large or related to conditions like PCOS	Usually does not affect fertility
Treatment	Depends on type (functional, dermoid, etc.)	Mostly observation unless large or symptomatic
Symptoms	Can cause menstrual changes	Does not usually affect periods

Understanding this difference often helps reduce confusion when people read their ultrasound reports.

How Are Paraovarian Cysts Diagnosed?

Paraovarian cysts are usually diagnosed through a combination of medical history, pelvic examination, and imaging tests. Since these cysts develop near the ovaries and fallopian tubes, they may not cause noticeable symptoms and are sometimes discovered during routine pelvic scans. If you experience pelvic pain, abdominal discomfort, or other unusual symptoms, your doctor may recommend an ultrasound to identify the cyst’s location, size, and appearance.

Can an Ultrasound Detect a Paraovarian Cyst?

Yes, an ultrasound can help detect a paraovarian cyst and determine its size, shape, and location. It uses sound waves to create images of the pelvic organs, allowing doctors to examine the area around the ovaries and fallopian tubes.

During the scan, the doctor looks at the cyst’s appearance and its relationship to the nearby ovary. An ultrasound can often help distinguish a paraovarian cyst from an ovarian cyst, although additional tests may be needed if the findings are unclear.

When Is a Transvaginal Ultrasound Recommended?

A transvaginal ultrasound may be recommended when a more detailed view of the pelvic organs is needed. During this procedure, a small ultrasound probe is gently inserted into the vagina to obtain clearer images of the ovaries, fallopian tubes, and surrounding structures.

Your doctor may recommend this scan if a cyst is suspected during a routine examination, if you have persistent pelvic pain, or if an abdominal ultrasound does not provide enough information. The results can help assess the cyst’s characteristics and guide decisions about monitoring or further evaluation.

How Do Doctors Distinguish a Paraovarian Cyst From an Ovarian Cyst?

Doctors primarily distinguish these cysts by identifying where they develop and how they appear on imaging tests.

• Paraovarian cyst: Develops in the tissues near the ovary and fallopian tube, rather than inside the ovary itself.
• Ovarian cyst: Develops within or on the surface of an ovary.

During an ultrasound, doctors assess whether the cyst is separate from the ovary and examine its size, shape, and internal features. In some cases, it may be difficult to determine the exact origin of a cyst using ultrasound alone. If the diagnosis remains uncertain, additional imaging or surgical evaluation may be considered.

An accurate diagnosis helps doctors decide whether the cyst requires regular monitoring or treatment. If you experience sudden, severe pelvic pain, particularly with nausea or vomiting, seek urgent medical attention, as these symptoms may indicate a complication such as ovarian or fallopian tube torsion.

Paraovarian Cysts and Pregnancy

One of the most common concerns is whether a paraovarian cyst and pregnancy can safely coexist. In most cases, the answer is yes.

Small paraovarian cyst pregnancy cases are usually monitored with regular scans. They do not typically interfere with conception or the growth of the baby.

However, a very large cyst may sometimes cause discomfort during pregnancy or twist due to increased movement within the abdomen. Your doctor may decide to monitor it more closely or plan removal if necessary.