Overview

Olfactory neuroblastoma, or esthesioneuroblastoma, is a very rare form of cancer arising from a specialized type of nerve cell involved in the sense of smell. It is usually seen developing in the upper end of the nasal cavity in the region around the cribriform plate, which forms the bottom part of the skull. While not frequently observed, it is a form of cancer that is quite locally aggressive and, in some cases, can metastasize to the lymph nodes or to distant organs.

Early detection and management through an interdisciplinary approach of the Head & Neck Oncology team is crucial for optimal results.

The specialists at Tender Palm Hospital, Gomti Nagar, Lucknow, are committed to providing comprehensive care, state-of-the-art imaging, individualized treatment plans, and follow-up for patients with olfactory neuroblastoma.

What Is Olfactory Neuroblastoma (Esthesioneuroblastoma)?

An olfactory neuroblastoma is a neuroendocrine malignancy arising from the neuroepithelial tissue responsible for olfactory function. This cancer usually affects the roof of the nasal cavity but can also spread to other areas, such as the paranasal sinuses, orbit, or skull base.

This cancer differs from squamous cell carcinoma and adenocarcinoma in that it arises from nerve cells rather than from the lining of the nasal cavity.

Though it progresses slowly, this cancer has the ability to infiltrate adjacent structures and relapse after treatment, which makes an oncology approach necessary.

Is Olfactory Neuroblastoma a Type of Paranasal Sinus & Nasal Cavity Cancer?

Yes. Olfactory neuroblastoma is a well-known case of paranasal sinus and nasal cavity cancer. It is an unusual case of malignant tumors of the sinonasal region and needs a special treatment method as compared to other nasal cavity cancers due to its proximity to the skull base and neuroendocrine nature.

What Are Paranasal Sinuses and Nasal Cavity?

The nasal cavity refers to the empty space located inside the nose. It operates as a filter, heating and humidifying the air you breathe in while also providing a surface for olfactory receptors, which give rise to the sense of smell.

Paranasal sinuses refer to spaces filled with air and surrounding the nasal cavity. They include:

• Maxillary sinuses
• Ethmoid sinuses
• Frontal sinuses
• Sphenoid sinuses

Olfactory neuroblastoma commonly arises in the upper part of the nasal cavity but may metastasize to the ethmoid sinuses, orbit, or anterior skull base.

What Is the Prevalence of Olfactory Neuroblastoma?

This disease is very rare. It makes up only 3-6% of nasal cavity and paranasal sinuses cancer.

It occurs at all ages but predominantly affects people between 40 and 60 years and, secondarily, young people and adolescents.

Men and women are equally affected by this condition.

What Are the Causes of Olfactory Neuroblastoma?

The causes are not yet well understood.

Genetic and molecular alterations in olfactory nerve cells are thought to underlie tumor formation. Unlike other sinonasal cancers, this cancer does not appear to be associated with smoking, drinking, or occupational dust exposure.

It usually arises spontaneously in most patients.

What Are the Risk Factors for Developing Olfactory Neuroblastoma Diseases?

Despite no risk factor being proven to cause the condition, olfactory neuroblastoma is more prone to arise in:

• People aged 40-60 years
• Adolescents and young adults (on rare occasions)
• Smokers and workers with minimal history of exposure to occupational dust
• People have genetic or molecular alterations that are still being studied.

Many patients have no risk factors.

What Are the Symptoms of Olfactory Neuroblastoma?

The symptoms of this condition are similar to those of chronic sinusitis and nasal polyps.

The symptoms include:

• Long-standing unilateral nasal blockage
• Nasal bleeding
• Loss of smell
• Unilateral nasal discharge
• Facial pain or facial pressure
• Headaches
• Presence of a nasal mass
• Eye swelling
• Double vision or visual blurring
• Excessive tears
• Numbness of the face in advanced disease

As the tumor enlarges, it could include the bottom of the skull or the eye socket, resulting in neurological or visual signs.

When to See Your Doctor?

If you have any of the following problems, you should consult an ENT specialist:

• One-sided nasal obstruction
• Nasal bleeding
• Loss of smell, which does not resolve
• Unresolved headaches with nasal symptoms
• Visual disturbances
• Facial swelling
• Nasal mass
• Symptoms that do not get better despite treatment for sinusitis

Early diagnosis ensures proper management and outcome.

How is Olfactory Neuroblastoma Diagnosed?

Diagnosis of olfactory neuroblastoma requires clinical, radiographic, and pathological examination.

History & Physical Examination

Your doctor will take your symptoms and history and perform a physical examination.

Nasal Endoscopy

A flexible or rigid nasal endoscope can be used to visualize the tumor and perform a biopsy.

Imaging

Imaging studies are vital for evaluating the size and extent of the tumor.

Your doctor will order:

• Computed Tomography (CT)
• Magnetic Resonance Imaging (MRI)
• PET-CT (if needed)

MRI is especially useful in evaluating invasion of the skull base, brain, and orbit.

Biopsy

A biopsy ensures you have an accurate diagnosis.

The tissue sample will be examined through:

• Histopathological examination
• IHC (Immunohistochemistry)
• Neuroendocrine tumor markers, if applicable

Pathologists may also assign the Hyams histological grade, which can predict the tumor's behavior and help plan its treatment.

Further Investigations

In accordance with your condition, further investigations can be:

• Blood test
• Neck imaging
• Lymph node assessment
• Chest imaging if metastases are expected

How Is Olfactory Neuroblastoma Staged?

Olfactory neuroblastoma is usually staged according to the Kadish classification, sometimes accompanied by TNM staging.

Staging of olfactory neuroblastoma can be done using:

• Stage A - Tumor restricted to the nasal cavity
• Stage B - Tumor affects the nasal cavity and paranasal sinuses
• Stage C - Tumor invades beyond the nasal cavity and paranasal sinuses to adjacent structures like the orbit or skull base
• Stage D - Tumor has metastasized to lymph nodes or distant organs

Accurate staging is important in determining the best course of treatment.

How Can Olfactory Neuroblastoma Be Treated?

Treatment is determined by:

• Tumor stage
• Tumor grade
• Spread of the tumor
• Overall health
• Preferences of the patient

An integrated Head & Neck Oncology team formulates the best treatment modality.

Surgery

Surgical treatment of localized tumors is the most prevalent.

Based on the extent of the disease, possible surgeries will include:

• Endoscopic endonasal tumor excision
• Skull base surgery
• Craniofacial resection
• Neck dissection if lymph nodes are involved

Whenever possible, minimally invasive surgical approaches will be used.

Radiation Therapy

Radiation therapy is usually advised postoperatively to reduce the chances of relapse.

However, it may also be used:

• If the tumor cannot be completely removed surgically
• As definitive therapy in some patients
• In case of recurrence

Chemotherapy

Chemotherapy may be suggested:

• In case of advanced-stage cancer
• To decrease the growth of the tumor before surgery
• Post-surgery in some high-risk cases
• For recurrent or metastatic cancer

Targeted Therapy and Immunotherapy

Even though not part of the standard treatment protocol, targeted therapy and immunotherapy may be considered in some cases, especially if a patient is enrolled in a clinical trial or has undergone certain molecular tests.

Is There Any Cure for Olfactory Neuroblastoma?

Yes. Many patients with localized olfactory neuroblastoma have a good chance of experiencing long-term disease control or cure with the help of surgery and radiation therapy.

The chances of effective treatment depend on:

• Stage of cancer
• Hyams tumor grade
• Complete tumor resection
• Response to radiation or chemotherapy
• Long-term follow-up

Olfactory Neuroblastoma Prognosis

The prognosis is defined by many factors that include:

• Kadish stage
• Hyams histological grade
• Tumor size
• Margins
• Lymph nodes
• Treatment response

Early-stage cancer patients usually have better outcomes than those with advanced cancer.

What Complications Are Possible?

When left untreated, olfactory neuroblastoma can metastasize to:

• Orbit (eye socket)
• Skull base
• Coverings of the brain
• Brain
• Local regional lymph nodes
• Lung
• Bone
• Other remote organs

The side effects of treatment will depend on the treatment approach used and are managed by the cancer team.

How Do Patients Recover After Treatment?

It is highly patient-specific depending on the treatment type.

Patients will need:

• Follow-up ENT examination
• Nasal endoscopy
• Computed tomography, magnetic resonance imaging, or PET-CT scan
• Skull base surgical rehabilitation, if necessary
• Speech/swallowing therapy, if necessary
• Nutritional counseling
• Psychological counseling, if needed

Why Is Follow-Up Necessary for Olfactory Neuroblastoma?

Olfactory neuroblastoma is characterized by the risk of late local relapse and distant metastasis many years after the initial treatment.

Follow-up allows:

• Early detection of relapse
• The monitoring of treatment effectiveness
• Detection of metastatic lymph nodes or distant relapse
• Monitoring of long-term treatment side effects
• Providing survivorship care

Follow-up usually involves clinical examination, nasal endoscopy, and imaging procedures.

Frequently Asked Questions (FAQs)

Is olfactory neuroblastoma a type of brain cancer?

No. Olfactory neuroblastoma develops from cells located in the olfactory region in the upper nasal cavity. Even though it can spread to the skull base or brain if untreated, it is not a primary brain tumor.

Why does olfactory neuroblastoma have another name?

Olfactory neuroblastoma is an older name for esthesioneuroblastoma, which is a more scientific name for this cancer.

Can olfactory neuroblastoma metastasize?

Yes. This kind of cancer can metastasize to neighboring structures and regional lymph nodes and even other parts of the body, such as the lungs and bones.

Does treatment always require surgery?

Surgical treatment is used to remove localized tumors, while radiation therapy and chemotherapy might be indicated based on the stage and extent of disease.

Can olfactory neuroblastoma come back?

Yes. Olfactory neuroblastoma can recur months or years later after treatment.

What is the Kadish staging system?

The Kadish staging system is one of the most commonly used classifications of the extent of olfactory neuroblastoma in the nasal cavity and paranasal sinuses.

How often will the post-treatment follow-up occur?

Most cases need lifelong follow-up with ENT examination, nasal endoscopy, and imaging studies, as recurrences may happen even after several years of successful treatment.

Why choose Tender Palm Super-Speciality Hospital for Olfactory Neuroblastoma (Esthesioneuroblastoma) Treatment in Lucknow, India?

Tender Palm Super-Speciality Hospital offers advanced Olfactory Neuroblastoma (Esthesioneuroblastoma) treatment in Lucknow, India, at an affordable cost. We have a team of experienced neurosurgeons and head and neck oncology specialists who provide accurate diagnosis and both non-surgical and surgical treatment options including endoscopic skull base resection, radiation therapy, and chemotherapy. Our Neurosurgery and Head and Neck Oncology team has decades of experience in successfully treating Olfactory Neuroblastoma (Esthesioneuroblastoma) in Lucknow, India.

To seek an Expert consultation for Olfactory Neuroblastoma (Esthesioneuroblastoma) Treatment in Lucknow, India:

Call us at +91-9076972161
Email at care@tenderpalm.com

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