Adenomatoid Odontogenic Tumor in India: Diagnosis & Care
What Is an Adenomatoid Odontogenic Tumor?
An adenomatoid odontogenic tumor (AOT) is a rare, benign tumor of the jaw.
It develops from cells linked to tooth formation. The World Health Organization lists AOT as a benign epithelial odontogenic tumor.
AOT is not a jaw cancer. It usually grows slowly. It also tends to stay well-defined.
Most cases respond well to conservative surgery. The surgeon can often remove the tumor without removing a large part of the jaw.
AOT mainly affects young people. It often occurs in the front part of the upper jaw. An impacted canine may also occur with the tumor. Still, AOT can appear in other parts of the jaw. It can also occur without an impacted tooth.
Who Develops an Adenomatoid Odontogenic Tumor?
AOT can affect people of different ages. However, it is most common in teenagers and young adults. Several patterns appear in published studies.
AOT often affects the second decade of life.
It also shows a female preference in many studies.
The maxilla is more common than the mandible.
The front part of the jaw is another common site.
An impacted tooth often occurs with AOT. The canine is the tooth most often involved.
A large review looked at 1,558 reported cases. Most patients were young. The maxilla and front part of the jaw were common sites. An impacted canine was also common in follicular AOT.
Indian research shows a similar age pattern. A study of 55 cases found a mean age of 19.8 years.
However, doctors should not diagnose AOT based on age or location alone.
What Causes an Adenomatoid Odontogenic Tumor?
The exact cause of AOT is still not known.
Researchers think it develops from tissue linked to tooth formation. However, its exact cell of origin remains under study.
Research has also found changes in the KRAS gene in many AOT cases. These changes can affect signals that control cell growth.
This research helps us understand how AOT may develop. However, it does not change the usual treatment.
Doctors still use clinical findings, scans, and histopathology to diagnose the tumor.
What Are the Symptoms of an Adenomatoid Odontogenic Tumor?
AOT may cause very few symptoms.
Many patients have no pain. Some may not know they have a tumor.
In many cases, a dentist finds the lesion during a routine check-up.
Common signs include:
A painless swelling
A tooth that does not erupt
A baby tooth that remains in place
Movement of nearby teeth
Expansion of the jaw bone
Mild facial asymmetry in larger lesions
An unerupted upper canine can be an important clue.
For example, a teenager may still have a baby canine. The permanent canine may not have erupted. An X-ray can then show a lesion near the tooth.
An Indian study found a slow-growing, painless swelling in most of its cases.
Therefore, a painless swelling still needs proper assessment.
How Does an Adenomatoid Odontogenic Tumor Look on an X-Ray?
AOT often appears as a well-defined radiolucent lesion.
In simple terms, the lesion looks darker than the nearby bone on an X-ray.
The tumor may surround an unerupted tooth. An impacted canine is a common finding.
Small calcified spots can also appear inside the lesion. However, AOT can look like other jaw lesions. For example, a lesion around an impacted tooth may look like a dentigerous cyst.
Some AOTs can also look like other odontogenic cysts or tumors. Therefore, an X-ray can suggest AOT. It may not confirm the diagnosis.
What Scans Are Needed for AOT?
The type of scan depends on the case.
A panoramic X-ray often gives the first view. It can show the lesion and nearby teeth. It can also show the position of an impacted tooth.
An intraoral X-ray can give more detail in a small area.
In some cases, the surgeon may suggest a CECT or a CBCT scan. CT scan gives a three-dimensional view of the jaw.
It can help show:
The full size of the lesion
The shape of the lesion
Bone expansion
Bone perforation
The position of an impacted tooth
Nearby tooth roots
The nasal cavity or sinus
However, not every patient needs a CT scan. The surgeon should use it when the extra detail will help with treatment planning.
How Is Adenomatoid Odontogenic Tumor Diagnosed?
Doctors use three main steps. These are clinical examination, imaging, and histopathology.
First, the surgeon examines the patient. Next, dental scans help define the lesion.
The tissue then needs a close look under a microscope.
AOT has a typical microscopic appearance. It contains groups and strands of odontogenic epithelial cells.
Small duct-like structures may also appear. Calcified material can occur as well.
These findings help the pathologist confirm the diagnosis.
This step is important because other jaw lesions can look similar on an X-ray.
Therefore, doctors should not diagnose AOT from an X-ray alone and a biopsy is needed.
What Conditions Can Look Like AOT?
Several jaw lesions can look like an adenomatoid odontogenic tumor.
A dentigerous cyst is one of the main possibilities. It can form around the crown of an impacted tooth.
An odontogenic keratocyst can also occur near an unerupted tooth.
A unicystic ameloblastoma may produce a similar image on an X-ray.
A calcifying odontogenic cyst can also resemble AOT. This is more likely when calcifications appear inside the lesion.
Other odontogenic tumors may also enter the differential diagnosis. For this reason, doctors need to study the clinical findings, scans, and tissue report together.
What Are the Types of Adenomatoid Odontogenic Tumor?
Doctors usually describe AOT in three forms.
Follicular AOT
The follicular type occurs around an unerupted tooth.
The maxillary canine is often involved. This type may look like a dentigerous cyst on an X-ray.
Extrafollicular AOT
The extrafollicular type does not form around an unerupted tooth.
Instead, it can occur between or near erupted teeth.
As a result, it may look like a cyst or another jaw lesion.
An Indian study found more extrafollicular than follicular cases. Among 55 cases, 67.3% were extrafollicular and 32.7% were follicular.
This finding is useful for Indian clinicians. It also shows why AOT should remain a possibility even when there is no impacted tooth.
Peripheral AOT
The peripheral type develops in soft tissue.
It usually affects the gum or nearby tissue. This type is much less common.
What Is the Treatment for Adenomatoid Odontogenic Tumor?
Most AOTs need surgical removal.
The usual treatment is enucleation. This means that the surgeon carefully removes the tumor from the surrounding tissue.
AOT often has a clear border. Therefore, the surgeon can usually remove it without taking a large amount of healthy bone.
Enucleation is the most common treatment for AOT. There are very few well-documented recurrences.
However, treatment depends on each patient. The surgeon will look at the size and site of the lesion. The position of nearby teeth also matters.
Your surgeon will also check the relation of the lesion to the nasal cavity, sinus, and other important structures.
Can the Impacted Tooth Be Saved?
Yes, some impacted teeth can be saved.
This is especially useful when AOT affects an impacted upper canine in a young patient.
The surgeon may remove the tumor while keeping the tooth in place.
Later, an orthodontist may use orthodontic traction to help the tooth erupt.
This approach can preserve the natural tooth.
However, not every impacted tooth is suitable for this method. The surgeon and orthodontist will check the position and angle of the tooth. They will also look at root development and available space.
Therefore, early diagnosis can give the patient more treatment choices.
What Is Recovery Like After AOT Surgery?
Recovery depends on the size and location of the tumor. The type of surgery also affects healing.
After surgery, patients may have some pain or swelling. These symptoms usually settle during the early healing period.
The surgeon may give advice about food, brushing, medicines, and wound care.
Follow-up is also important.
The surgeon may review the area during the healing period. In some cases, follow-up imaging may be needed.
Patients who need orthodontic traction will need longer follow-up.
Can an Adenomatoid Odontogenic Tumor Come Back?
AOT has a very low recurrence rate. Research has found very few reported recurrences.
Still, recurrence can happen. Therefore, patients should attend the follow-up visits advised by their surgeon. The low recurrence rate is one reason conservative surgery is usually suitable for AOT.
Is AOT Dangerous?
AOT is a benign jaw tumor. It does not usually behave like an aggressive cancer. It also tends to grow slowly. However, a growing tumor can still cause local problems.
For example, it can expand the jaw bone. It can move nearby teeth. It can also delay the eruption of a permanent tooth.
A larger tumor in the upper jaw may grow close to the nasal cavity or maxillary sinus.
Therefore, patients should not ignore an unexplained jaw swelling or a tooth that does not erupt.
When Should You See an Oral and Maxillofacial Surgeon?
You should see an oral and maxillofacial surgeon when a permanent tooth does not erupt as expected.
You should also seek an assessment for an unexplained jaw swelling.
A retained baby tooth may also need an X-ray, especially when the permanent tooth is missing.
This is especially important for an unerupted upper canine.
An oral and maxillofacial surgeon can examine the patient and review the scans.
The surgeon can then decide whether more tests are needed.
Some patients may also need care from an oral pathologist or orthodontist.
Final Takeaway
An adenomatoid odontogenic tumor (AOT) is a rare, benign tumor of the jaw that typically affects younger patients. It often develops in the anterior part of the upper jaw and may be associated with an impacted canine tooth. However, AOT can also occur in other areas of the jaw and can develop even in the absence of an impacted tooth.
Several jaw lesions can appear similar on X-rays, making it difficult to definitively diagnose AOT based solely on imaging. Histopathology plays a critical role in confirming the diagnosis of the tumor.
Most cases of AOT can be treated with conservative surgery, and in certain cases, the surgeon may be able to preserve the impacted tooth. Recurrence of AOT is uncommon, but follow-up care is still important.
Get Expert Evaluation for Jaw Tumors at Curavi Dental and Maxillofacial Centre
An unexplained jaw swelling or an unerupted tooth needs proper evaluation.
At Curavi Dental and Maxillofacial Centre, Hyderabad, patients can receive specialist care for jaw tumors, impacted teeth, and other oral and maxillofacial conditions. Our team can assess the clinical findings and recommend suitable imaging.
When needed, treatment can include surgical removal of the lesion. Care may also involve pathology and orthodontic treatment.
Book a consultation with an Oral and Maxillofacial Surgeon at Curavi, situated in Paradise, Secunderabad, Hyderabad if you have an unexplained jaw swelling, an impacted tooth, or a suspected adenomatoid odontogenic tumor.
Call us at 9007315716 to learn more.
Frequently Asked Questions
Is Adenomatoid Odontogenic Tumor Cancerous?
No. AOT is a benign odontogenic tumor. It is not a malignant jaw cancer.
Is AOT Linked to an Impacted Canine?
Yes. An impacted canine is common in follicular AOT. However, AOT can also occur without an impacted tooth.
Does AOT Cause Pain?
Usually, no. Many patients have a painless swelling or delayed tooth eruption.
Does AOT Need Major Jaw Surgery?
Usually, no. Most cases need conservative surgery, such as enucleation.
Can an Impacted Tooth Be Saved?
Sometimes. The surgeon may preserve a suitable tooth. An orthodontist can then guide it into the dental arch.
Can AOT Come Back?
Recurrence is uncommon. However, it can occur. Regular follow-up is therefore important.
References:
Chrcanovic BR, Gomez RS. Adenomatoid odontogenic tumor: an updated analysis of the cases reported in the literature. J Oral Pathol Med. 2019;48(1):10-16. doi:10.1111/jop.12783.
Bansal SP, Shaikh S, Arvandekar AS, Dhanawade SS, Desai RS. Analysis of 55 cases of adenomatoid odontogenic tumor in an Indian population and review of literature. Med Oral Patol Oral Cir Bucal. 2022;27(1):e85-e93. doi:10.4317/medoral.24977.
Soluk-Tekkesin M, Wright JM. The World Health Organization Classification of Odontogenic Lesions: a summary of the changes of the 2022 (5th) edition. Turk Patoloji Derg. 2022;38(2):168-184. doi:10.5146/tjpath.2022.01573.
Barnts K, Feng JQ, Qin C, Zhang H, Cheng YSL. Adenomatoid odontogenic tumor: evidence for a mixed odontogenic tumor. Oral Surg Oral Med Oral Pathol Oral Radiol. 2022;133(6):675-683. doi:10.1016/j.oooo.2021.11.005.
Coura BP, Bernardes VF, de Sousa SF, França JA, Pereira NB, Pontes HAR, et al. KRAS mutations drive adenomatoid odontogenic tumor and are independent of clinicopathological features. Mod Pathol. 2019;32(6):799-806. doi:10.1038/s41379-018-0194-4.
Coura BP, Guimarães LM, Gomez RS, Gomes CC. KRAS oncogenic mutations in benign tumors: adenomatoid odontogenic tumor as a model. Mutat Res Rev Mutat Res. 2025;796:108552. doi:10.1016/j.mrrev.2025.108552.
Taneja S, Jain A. Management of adenomatoid odontogenic tumor in a pediatric patient with preservation of an associated impacted tooth: a combined surgical and orthodontic approach. Front Dent. 2023;20:31. doi:10.18502/fid.v20i31.13393.
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