Wandering Spleen
A wandering spleen is a rare condition in which the spleen is not held in its normal location in the upper left abdomen because the ligaments that usually anchor it are absent, congenitally weak, or stretched. The spleen can move to other parts of the abdomen and pelvis, supported only by a long, mobile vascular pedicle. Many patients with wandering spleen have no symptoms, but the long pedicle is vulnerable to twisting (torsion), which can compromise blood flow and become a surgical emergency. Imaging—particularly CT and MRI—is central to diagnosis and management.
What is it?
The spleen is normally held in the upper left abdomen by several ligaments that anchor it to the diaphragm, stomach, left kidney, and colon. In a wandering spleen (also called ectopic spleen or splenoptosis), these ligaments are congenitally absent, abnormally formed, or significantly stretched. As a result, the spleen is not fixed in place and can move to unusual locations within the abdomen or pelvis. Because the spleen’s blood supply enters through a single vascular pedicle (containing the splenic artery and vein), this pedicle becomes long and mobile, and the spleen essentially hangs from it as it moves.
Wandering spleen is rare. It is recognized across all age groups but is most commonly seen in two main populations: children, particularly boys under approximately 10 years of age (where a congenital ligamentous abnormality is most often responsible), and women of reproductive age, including those with multiparity (multiple previous pregnancies), where acquired weakness of the supporting structures is thought to play a role. Other contributors may include connective tissue disorders, abdominal trauma, hormonal influences, and splenomegaly itself, which can stretch the supporting ligaments over time.
The clinical importance of a wandering spleen comes from two main concerns. First, the spleen can become palpable in unusual locations and produce abdominal symptoms that may not be obvious in their cause. Second, and more importantly, the long, mobile vascular pedicle is vulnerable to twisting (torsion). When the pedicle twists, blood flow to and from the spleen can be partially or completely interrupted, which can produce severe abdominal pain, splenic congestion or infarction, secondary complications such as splenic vein thrombosis or pancreatitis (when the tail of the pancreas is involved), or—if untreated—necrosis and rupture of the spleen.
Symptoms vary widely depending on the location of the spleen and the presence or absence of torsion. Many patients have no symptoms or only intermittent vague abdominal discomfort. Others may notice a palpable mobile mass in the abdomen or pelvis that can sometimes change position with movement or body posture. Symptoms may include intermittent abdominal pain or fullness, early fullness with meals, nausea, vomiting, constipation, urinary frequency or other pelvic symptoms (when the spleen is located in the pelvis), and discomfort that may be related to specific activities or positions. Some patients have years of intermittent symptoms before diagnosis. Acute torsion typically presents with sudden severe abdominal pain, nausea, vomiting, abdominal distension, fever, signs of bowel obstruction, low blood counts (when bleeding occurs or splenic function is rapidly affected), and—in severe cases—signs of shock. Acute torsion is a surgical emergency.
Diagnosis combines clinical assessment and imaging. Physical examination may reveal a mobile mass in an unusual location of the abdomen or pelvis, particularly when the patient is examined in different positions. Ultrasound can detect a spleen in an abnormal location and assess blood flow through the splenic vessels, which is particularly important when torsion is suspected. CT of the abdomen with intravenous contrast is the primary imaging test and provides detailed information about the location, shape, and condition of the spleen; the absence of a spleen in its usual location; the appearance of the vascular pedicle (including the characteristic “whirl sign” in torsion); and any complications such as infarction, hemorrhage, pancreatic involvement, or bowel obstruction. MRI provides similar information without ionizing radiation and may be useful in selected cases. Nuclear medicine spleen scans can confirm splenic tissue in unusual locations but are used less commonly with modern cross-sectional imaging. Blood tests can show signs of splenic congestion or hypersplenism in chronic cases and signs of infection, infarction, or hemorrhage in acute presentations.
Important to Know
Management of a wandering spleen depends on the severity of symptoms, the condition of the spleen, and whether acute torsion is present. Care is best delivered in centers with surgical expertise, often involving general or pediatric surgeons (depending on the patient’s age), interventional radiologists, hematologists, and infectious disease specialists, with primary care or pediatric coordination.
When the wandering spleen is identified before significant complications develop, splenopexy—surgical fixation of the spleen in its normal location—is the preferred treatment whenever feasible. Splenopexy preserves the spleen and its important immune functions. Several techniques exist, including suturing the spleen to surrounding structures, placement of the spleen in a mesh pouch or pocket made of nearby tissue, and creation of an extraperitoneal pocket. The choice of technique is individualized based on anatomy, age, and surgeon experience, and many procedures can be performed laparoscopically. Splenopexy is generally recommended even in patients with mild or intermittent symptoms because of the ongoing risk of torsion.
When the spleen has been severely damaged by torsion, infarcted, complicated by significant bleeding, or cannot be successfully repositioned and fixed, splenectomy (removal of the spleen) is required. In acute torsion presenting with viable splenic tissue, prompt surgery can sometimes save the spleen with detorsion and splenopexy, although the decision depends on the appearance of the spleen at surgery and other factors.
Patients undergoing total splenectomy require specific attention to infection prevention. This includes vaccinations against encapsulated bacteria (such as pneumococcal, meningococcal, and Haemophilus influenzae type b vaccines), antibiotic prophylaxis in selected patients (particularly children for a defined time after splenectomy), education about prompt evaluation of fevers, and consideration of travel-related risks. Patients and families benefit from clear, written guidance about these measures.
For patients with truly asymptomatic wandering spleen identified incidentally on imaging, treatment decisions are individualized. Many surgeons recommend elective splenopexy because of the ongoing risk of torsion, particularly in children and in patients with significant mobility of the spleen. In selected patients—such as those with significant other medical issues or limited expected ability to tolerate surgery—observation may be considered after careful discussion. Patient education about warning signs of torsion is essential in any patient with known wandering spleen who has not undergone definitive treatment.
Acute torsion is a surgical emergency. Prompt evaluation, urgent imaging, and emergency surgery offer the best chance of saving the spleen and preventing serious complications. Patients with known wandering spleen who develop sudden severe abdominal pain should seek immediate emergency care.
Care is typically coordinated by primary care clinicians, pediatricians (in children), general or pediatric surgeons, interventional radiologists, and—when relevant—hematologists. Imaging and laboratory findings are interpreted alongside the patient’s symptoms, examination, and broader clinical context rather than in isolation.
Patient and family education plays an important role. Understanding the diagnosis, the rationale for elective splenopexy (when recommended), the warning signs of torsion, and—when relevant—the preventive measures after splenectomy contribute to better outcomes.
Red flag symptoms include sudden severe abdominal pain (especially in the upper left abdomen, around the navel, or in the pelvis depending on the location of the spleen), lightheadedness or fainting, rapid heart rate, cool clammy skin or signs of shock, severe vomiting with abdominal pain, signs of bowel obstruction (such as severe abdominal distension and inability to pass stool or gas), high fever with chills, signs of severe infection, severe shortness of breath, or sudden change in known abdominal symptoms. These warrant immediate emergency evaluation, as they may indicate splenic torsion, rupture, severe infection, or another serious abdominal condition.