Fitz-Hugh-Curtis syndrome is an inflammation of the liver capsule, called perihepatitis, that develops as a complication of a pelvic infection, most often from chlamydia or gonorrhea. The hallmark symptom is sharp pain in the right upper abdomen that can easily be mistaken for gallbladder disease, kidney problems, or even pneumonia. Because it mimics so many other conditions and lacks a single definitive lab test, the diagnosis is frequently missed or delayed, sometimes leading patients through rounds of unnecessary workups before anyone connects the abdominal pain to an underlying sexually transmitted infection.
What Actually Happens in the Body
The condition involves inflammation of the thin membrane surrounding the liver, known as Glisson’s capsule, without the infection actually penetrating the liver tissue itself. The liver parenchyma stays intact; it is the capsule and the surrounding peritoneal surfaces that become inflamed and, over time, can develop scar tissue.1Kosin Medical Journal. A Case of Fitz-Hugh-Curtis syndrome in a male patient This distinction matters because standard liver function tests often come back normal or only mildly abnormal, which throws clinicians off the trail.
The infection is thought to reach the liver area by one of three routes. The most commonly described pathway is ascending infection: bacteria travel upward from the cervix or vagina through the uterus, into the fallopian tubes, and then spill into the peritoneal cavity, eventually reaching the liver capsule. Alternatively, the organisms can spread through the lymphatic system or via the bloodstream.2International Journal of Case Reports and Images. Perihepatitis (Fitz-Hugh-Curtis syndrome): Case report and review of literature Along the way, the infection can cause inflammation at multiple sites, including the uterine lining, the fallopian tubes, and the pelvic peritoneum, before settling around the liver.
The Bacteria Behind It
When the syndrome was first described in the 1930s, gonorrhea was assumed to be the sole culprit. That changed when researchers began testing patients’ blood for antibodies against Chlamydia trachomatis. In one study of 23 patients with confirmed Fitz-Hugh-Curtis syndrome, roughly 87% showed serologic evidence of acute chlamydia infection, while gonorrhea was found in about 30%.3PubMed. Chlamydia trachomatis infection in Fitz-Hugh-Curtis syndrome A larger emergency-department study echoed this pattern, identifying chlamydia as the pathogen in 89% of cases.4PubMed Central. Clinical features of Fitz-Hugh-Curtis Syndrome in the emergency department Chlamydia, not gonorrhea, is the dominant player.
That said, the microbiology is not limited to just two organisms. Case reports and reviews have implicated several other species, including Mycoplasma genitalium, Peptostreptococcus, and Prevotella, among others.5PubMed Central. Fitz Hugh Curtis Case Report This broader bacterial landscape has practical implications for treatment decisions, because a narrow antibiotic regimen aimed only at chlamydia or gonorrhea could miss other contributors.
Who Gets It
The textbook patient is a young woman of reproductive age with pelvic inflammatory disease. Most clinical series describe women in their teens through their thirties, and the condition has historically been considered an exclusively female diagnosis. Among adolescents hospitalized for pelvic inflammatory disease, one study found that about 4% developed symptomatic Fitz-Hugh-Curtis syndrome.6PubMed. Incidence of Fitz-Hugh-Curtis syndrome in adolescents who have pelvic inflammatory disease That number likely underestimates the true rate, since patients with milder forms may never be diagnosed.
The condition does occur in men, though rarely. Several published cases describe male patients presenting with the same right-upper-quadrant pain and characteristic findings on imaging or laparoscopy.7PubMed Central. Case of Fitz-Hugh-Curtis syndrome in male without presentation of sexually transmitted disease In men, the ascending-infection route from the female reproductive tract obviously does not apply, so spread through the bloodstream or lymphatic system is the presumed mechanism.8PubMed Central. Fitz-Hugh-Curtis syndrome in a male patient One reported case involved an HIV-positive man with chlamydial proctitis who developed the syndrome, reinforcing that the infection can originate outside the genital tract entirely.9PubMed Central. A rare case of Fitz-Hugh-Curtis syndrome caused by Chlamydia trachomatis in an HIV-positive male patient The clinical presentation in men mirrors what is seen in women: the same sharp abdominal pain, the same tenderness, and sometimes pleuritic chest pain on the right side.10PubMed Central. Case of Fitz-Hugh-Curtis syndrome in male without presentation of sexually transmitted disease
What the Pain Feels Like and Why It Is Confusing
The classic symptom is sharp, pleuritic pain in the right upper quadrant of the abdomen, meaning it tends to worsen with breathing. It can radiate to the right shoulder and is usually acute in onset. The pain may or may not be accompanied by obvious signs of pelvic infection such as vaginal discharge or lower abdominal tenderness.11PubMed. Fitz-Hugh-Curtis syndrome: a diagnosis to consider in women with right upper quadrant pain When pelvic symptoms are absent or subtle, the clinical picture looks a lot like gallbladder inflammation, a kidney stone, a perforated ulcer, or even a pulmonary embolism. One case report describes a patient whose initial workup was entirely focused on cholecystitis before the true diagnosis emerged.
An illustrative example of the diagnostic odyssey comes from a case of a 34-year-old woman who arrived at an emergency department with right-upper-quadrant pain and markedly elevated inflammatory markers (her C-reactive protein was 60 times the upper limit of normal). It took seven days of hospitalization without improvement before a urine test for chlamydia came back positive, pointing to the correct diagnosis. She had no signs or symptoms of current pelvic inflammatory disease at all.12The American Journal of Medicine. A 34-Year-Old Woman with Right Upper Quadrant Pain and Elevated Inflammatory Markers Cases like this show how the absence of obvious genital symptoms can push Fitz-Hugh-Curtis syndrome far down the list of suspected diagnoses.
Why It Gets Missed So Often
There is no single blood test that confirms the diagnosis. Inflammatory markers like C-reactive protein and erythrocyte sedimentation rate are usually elevated, but those values are nonspecific and could point to dozens of conditions. Liver enzymes may be normal or only mildly raised, which makes clinicians less likely to think about the liver region at all. Partly because of this lack of specific clinical and laboratory features, the diagnosis is often missed or delayed, sometimes leading patients through extensive and unnecessary evaluations.13Pediatric Emergency Care. Fitz-Hugh–Curtis Syndrome in Adolescent Females: A Diagnostic Dilemma
The problem is compounded in adolescents, who may be reluctant to disclose sexual activity and whose clinicians may not think to screen for sexually transmitted infections during an abdominal pain workup. And because many emergency physicians see the condition only rarely, it does not always make the mental shortlist of things that cause right-upper-quadrant pain. A four-year emergency-department study identified just 82 cases over the entire period, which gives a sense of how infrequently most physicians encounter it firsthand.14PubMed Central. Clinical features of Fitz-Hugh-Curtis Syndrome in the emergency department
How It Is Diagnosed
Imaging plays a central role in catching the syndrome when clinical suspicion is low. Contrast-enhanced CT scanning is the most useful noninvasive tool. The hallmark finding is abnormal enhancement of the liver capsule on the arterial phase of the scan, particularly along the front surface of the liver.15PubMed. Fitz-Hugh-Curtis syndrome: CT findings of three cases This capsular enhancement reflects the active inflammation of the peritoneum surrounding the liver and is distinct from what you would see with gallbladder disease or a liver abscess. The finding can be subtle, though, and may only be visible during the early arterial phase of contrast injection, which means it can be missed if the scan is not timed correctly or if the radiologist is not specifically looking for it.16PubMed Central. CT Diagnosis of Fitz-Hugh and Curtis Syndrome: Value of the Arterial Phase Scan
Ultrasound is more readily available, especially in emergency settings, but it is less reliable for this particular diagnosis. The ultrasound may appear entirely normal, or it may show a thickened liver capsule and small amounts of fluid around the liver, both of which suggest perihepatitis but are not specific enough to confirm it.17Yeungnam University Journal of Medicine. Ultrasonographic findings in Fitz-Hugh-Curtis syndrome: a thickened or three-layer hepatic capsule Ultrasound is better suited as a way to rule out other causes of the pain, like gallstones or a distended gallbladder, than to positively identify Fitz-Hugh-Curtis syndrome.
The definitive diagnostic method, and the one that gives the syndrome its most recognizable visual, is laparoscopy. Looking directly at the liver surface through a small camera reveals the so-called “violin string” adhesions: thin, fibrous bands stretching between the liver capsule and the abdominal wall or diaphragm.18Journal of Rare Diseases. Fitz-Hugh-Curtis syndrome: a case study of a frequently missed diagnosis These adhesions are the hallmark of the chronic or healing stage of the disease. In the acute phase, you may instead see frank inflammation, redness, and exudate on the liver surface without fully formed adhesions. Laparoscopy is not a first-line test for everyone with abdominal pain, of course, but it becomes valuable when other tests have been inconclusive and the patient is not getting better.
Treatment
Because the underlying problem is a bacterial infection, antibiotics are the core of treatment. The choice of drugs follows guidelines for pelvic inflammatory disease and needs to cover chlamydia and gonorrhea at minimum, with broader anaerobic coverage depending on the clinical picture. A common inpatient approach involves intravenous antibiotics initially, followed by a switch to oral medication once the patient improves. One published case described a patient who received 48 hours of IV antibiotics and was then discharged on a 14-day course of doxycycline and metronidazole.19PubMed Central. Fitz Hugh Curtis Case Report In milder cases where patients are stable enough, outpatient oral therapy can be sufficient. A 21-day course of doxycycline alone resolved symptoms in the HIV-positive male patient described earlier.20PubMed Central. A rare case of Fitz-Hugh-Curtis syndrome caused by Chlamydia trachomatis in an HIV-positive male patient
The good news is that with appropriate antibiotics, outcomes are generally favorable. In the four-year emergency-department study mentioned earlier, about 63% of patients were admitted to the hospital, and all of the admitted patients improved with a combination of antibiotic therapy and supportive care.21PubMed Central. Clinical features of Fitz-Hugh-Curtis Syndrome in the emergency department The acute inflammation and pain typically resolve within days of starting the right medication.
Surgery comes into play in a narrower set of circumstances. When adhesions from a prior episode of perihepatitis continue to cause chronic pain, those fibrous bands can be divided laparoscopically. One early report described using a laser to lyse the adhesions through a small incision, after which the patient’s pain resolved completely with no recurrence over six months of follow-up.22PubMed. Laparoscopic treatment of painful perihepatic adhesions in Fitz-Hugh-Curtis syndrome This is not something every patient needs, but for those left with persistent discomfort after the infection itself has cleared, adhesiolysis can offer real relief.
Conditions It Mimics
One reason clinicians need to keep this syndrome in mind is that the differential diagnosis list is long and full of more common conditions. The overlap with cholecystitis (gallbladder inflammation) is the most clinically treacherous. Both cause right-upper-quadrant pain, both can produce tenderness when pressing under the rib cage, and both can be accompanied by nausea. The differences are subtle: cholecystitis is more often related to meals and gallstones are usually visible on ultrasound, while Fitz-Hugh-Curtis pain tends to be sharper and more pleuritic. Other conditions that can look similar include kidney infection or stones on the right side, a perforated stomach ulcer, pneumonia in the right lower lung, and pulmonary embolism.23PubMed. Fitz-Hugh-Curtis syndrome: a diagnosis to consider in women with right upper quadrant pain
The practical takeaway for patients and clinicians alike is that in any young, sexually active person presenting with unexplained right-upper-quadrant pain and elevated inflammatory markers, screening for chlamydia and gonorrhea should be part of the workup. This is especially true when the gallbladder looks normal on ultrasound and liver enzymes are not particularly elevated. A nucleic acid amplification test from a urine sample or genital swab is fast, inexpensive, and can redirect the diagnostic path dramatically.
Long-Term Consequences
The perihepatic adhesions themselves, once formed, do not typically cause ongoing organ damage to the liver. The liver parenchyma was never infected in the first place, and liver function is generally preserved. The adhesions can occasionally cause chronic or intermittent right-upper-quadrant discomfort, but many patients with old adhesions are entirely asymptomatic and only discover them incidentally during surgery for something else.
The more serious long-term concerns relate to the underlying pelvic infection that caused the syndrome. Fitz-Hugh-Curtis syndrome is, by definition, a sign that a pelvic infection has spread beyond the pelvis. That same infection can cause significant damage to the fallopian tubes. A pathological study found that tubal infertility and ectopic pregnancy were more commonly associated with Fitz-Hugh-Curtis syndrome than with other conditions requiring surgery in the same anatomic region.24PubMed. Pathological study of Fitz-Hugh-Curtis syndrome evaluated from fallopian tube damage This means that diagnosing and treating the infection promptly is not just about resolving the abdominal pain. It is about preserving fertility. Every episode of pelvic inflammatory disease increases the risk of tubal scarring, and by the time the infection has reached the liver capsule, significant pelvic involvement has already occurred.
The Name and Its History
The syndrome carries the names of two physicians who described it independently in the 1930s. Arthur Curtis, a gynecologist in Chicago, and Thomas Fitz-Hugh Jr., an internist in Philadelphia, both reported seeing distinctive adhesions around the livers of women with gonorrheal pelvic infections. Curtis described the adhesions as resembling violin strings, an image that stuck and is still used in every textbook and case report on the subject.25Kosin Medical Journal. A Case of Fitz-Hugh-Curtis syndrome in a male patient Their descriptions were remarkably specific, and the violin-string adhesion remains the visual signature of the chronic phase of the disease. What has changed since the 1930s is the understanding that chlamydia, not gonorrhea, is the predominant cause, and that the condition is not limited to women.
When Partners Need Treatment Too
Because Fitz-Hugh-Curtis syndrome originates from a sexually transmitted infection in the vast majority of cases, treatment of the patient alone is not enough. Sexual partners need to be tested and treated as well, even if they are asymptomatic. Chlamydia in particular is frequently silent in both men and women, meaning a partner can harbor and transmit the infection without knowing it. Failure to treat partners sets up a cycle of reinfection, additional episodes of pelvic inflammatory disease, and cumulative reproductive damage. Public-health guidelines for pelvic inflammatory disease universally recommend partner notification and treatment, and the same logic applies when the PID has progressed to perihepatitis.
Broader STI prevention strategies also apply here. Routine chlamydia screening is recommended for sexually active women under 25 and for older women with risk factors. Consistent condom use reduces the risk of both chlamydia and gonorrhea transmission. These are not novel recommendations, but they take on added urgency when you consider that Fitz-Hugh-Curtis syndrome represents a stage of infection where significant harm to both the peritoneum and the reproductive tract has already occurred. Catching and treating chlamydia early, before it ascends from the cervix, prevents the entire cascade from starting.