What is Isolated Gallbladder Agenesis?
At a Glance
Isolated gallbladder agenesis is a rare condition where a person is born without a gallbladder. Because it can cause abdominal pain similar to gallstones, doctors use an MRCP imaging test to confirm the diagnosis and prevent unnecessary surgery.
Discovering that you were born without a gallbladder can be a confusing experience, especially if you have been experiencing symptoms that feel exactly like gallbladder disease [1][2]. However, this condition is a recognized anatomical variant that, while very rare, can be safely managed once correctly identified [3].
Understanding Gallbladder Agenesis
Gallbladder agenesis (GBA) is a rare congenital anomaly—a condition present from birth—where the gallbladder simply never formed [4]. It is estimated to occur in only about 0.007% to 0.06% of the population [5][4].
Because it is so rare, it is often missed on routine tests. Many people only find out they have it after a routine ultrasound fails to find the gallbladder, or even more commonly, when they are undergoing surgery for suspected gallbladder issues and the surgeon cannot find the organ [2][6].
Why It Happens: The Embryology
The gallbladder normally begins to form during the early weeks of pregnancy. It starts as a small “bud” called the cystic bud, which grows out from a larger structure known as the hepatic diverticulum (the precursor to the liver and biliary system) [4][7].
In cases of agenesis, this development is interrupted:
- Around the fourth week of fetal development, the hepatic diverticulum emerges from the gut [7].
- This structure should divide into two parts: the pars hepatica (which becomes the liver) and the pars cystica (which should become the gallbladder and its duct) [7][8].
- In GBA, the pars cystica fails to develop or sprout correctly, meaning the gallbladder never begins its journey [4].
What “Isolated” Means for You
Doctors use the term isolated to describe your condition when the missing gallbladder is the only anatomical difference found [4].
- Isolated Gallbladder Agenesis: This means the gallbladder is missing, but the rest of your body—including your heart, limbs, and other organs—formed typically [9][10].
- Syndromic Gallbladder Agenesis: In a smaller number of cases, GBA is “syndromic,” meaning it occurs alongside other congenital issues, such as heart defects or certain chromosomal conditions [9][10].
If your condition is isolated, it is generally considered a singular anatomical variant rather than a sign of a broader medical syndrome [4].
The Challenge of Diagnosis
One of the most frustrating aspects of GBA is that it often mimics the symptoms of gallstones or cholecystitis (gallbladder inflammation) [2][1]. Patients may experience pain in the upper right side of the abdomen, nausea, or bloating, especially after fatty meals [11][12].
Because these symptoms are so classic for gallbladder disease, and because a “missing” gallbladder on an ultrasound is often misinterpreted as a “shrunken” gallbladder, patients are sometimes sent to surgery unnecessarily [2][13]. To prevent this, doctors now recommend a Magnetic Resonance Cholangiopancreatography (MRCP) [6]. This is a non-invasive MRI scan that provides a highly detailed map of the bile ducts and is considered the “gold standard” for confirming the diagnosis [6][14].
Common questions in this guide
What does it mean to have isolated gallbladder agenesis?
Can I have gallbladder pain if I don't have a gallbladder?
How is gallbladder agenesis diagnosed?
Will I need surgery for gallbladder agenesis?
Questions to Ask Your Doctor
Curated prompts to bring to your next appointment.
- 1.Has my diagnosis been confirmed with a gold-standard test like an MRCP?
- 2.Does my imaging show any signs of an ectopic or misplaced gallbladder rather than true agenesis?
- 3.Are there any other findings in my biliary tract, such as a dilated common bile duct or choledochal cysts?
- 4.How should we manage my symptoms now that we know traditional gallbladder surgery is not an option?
- 5.Are there any other anatomical variants or congenital issues I should be aware of, or is this truly isolated?
Questions For You
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References
References (14)
- 1
A case report of a patient with gallbladder agenesis resulting in a common bile duct injury.
Bahraini A, Odom JW, Talukder A
International journal of surgery case reports 2018; (51()):99-101 doi:10.1016/j.ijscr.2018.07.024.
PMID: 30149331 - 2
Gallbladder agenesis diagnosed during pregnancy- Case report and a literature review.
Pinto MYP, Neelankavil S
International journal of surgery case reports 2023; (105()):108019 doi:10.1016/j.ijscr.2023.108019.
PMID: 36966713 - 3
Gallbladder agenesis discovered during surgery, a sum of inadequate decisions.
Molina GA, Ayala AV, Arcia AC, et al.
Annals of medicine and surgery (2012) 2022; (77()):103585 doi:10.1016/j.amsu.2022.103585.
PMID: 35444803 - 4
Gallbladder agenesis: An accidental finding during laparotomy for hepatic tumor.
Mohammed AA, Arif SH
International journal of surgery case reports 2021; (82()):105875 doi:10.1016/j.ijscr.2021.105875.
PMID: 33857765 - 5
Complete enclosure of gall bladder inside the lesser omentum - a rare anomaly.
Nayak SB, Shetty SD, Vasudeva SK
Morphologie : bulletin de l'Association des anatomistes 2022; (106(354)):206-208 doi:10.1016/j.morpho.2021.06.001.
PMID: 34147369 - 6
Case report of a gallbladder agenesis, a diagnostic challenge.
Cegarra-Besora A, González-Álvarez P, Montraveta-Querol M, Bovo MV
International journal of surgery case reports 2022; (94()):107026 doi:10.1016/j.ijscr.2022.107026.
PMID: 35398782 - 7
Uncommon Presentation of Xanthogranulomatous Cholecystitis in a True Gallbladder Diverticulum: A Case Report and Literature Review.
Al Saleem MA, AlSaeed ZM, Alhashim IW
The American journal of case reports 2024; (25()):e943843 doi:10.12659/AJCR.943843.
PMID: 38755958 - 8
Anomalous radiological and clinical demonstration of gallbladder duplication in an asymptomatic pregnant female.
Petrou A, Silva M, Manzelli A, et al.
Annali italiani di chirurgia 2017; (6()).
PMID: 28232643 - 9
Association between gallbladder agenesis and choledochal cyst: cause or coincidence?
Aneiros Castro B, Cano Novillo I, García Vázquez A, De Miguel Moya M
BMJ case reports 2019; (12(6)) doi:10.1136/bcr-2019-229986.
PMID: 31248898 - 10
Gallbladder Agenesis in a Patient With Klinefelter Syndrome Presenting With Hematemesis and Right Upper-Quadrant Pain.
Singh G, Petroski J, Marden D, Knauer A
The American journal of case reports 2026; (27()):e949945 doi:10.12659/AJCR.949945.
PMID: 41527322 - 11
Gallbladder agenesis: A case report and review of the literature.
Pipia I, Kenchadze G, Demetrashvili Z, et al.
International journal of surgery case reports 2018; (53()):235-237 doi:10.1016/j.ijscr.2018.10.061.
PMID: 30428439 - 12
Gallbladder agenesis in the elderly: a diagnostic challenge.
Ismail IB, Rebii S, Zenaidi H, Zoghlami A
The Pan African medical journal 2020; (37()):259 doi:10.11604/pamj.2020.37.259.23268.
PMID: 33598074 - 13
Gallbladder Agenesis Mimicking Chronic Cholecystitis in a Young Woman.
Joseph JS, Ramesh V, Allaham KK, et al.
Cureus 2021; (13(9)):e18222 doi:10.7759/cureus.18222.
PMID: 34703708 - 14
Gallbladder Agenesis: A Case Report.
Salazar MC, Brownson KE, Nadzam GS, et al.
The Yale journal of biology and medicine 2018; (91(3)):237-241.
PMID: 30258310
This page provides educational information about gallbladder agenesis and its diagnosis. It is not a substitute for professional medical advice, and you should always consult your gastroenterologist to discuss your specific symptoms and imaging results.
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