Disorders of the lacrimal gland may manifest as insufficient tear production or excessive secretion. These conditions may occur in the form of dry eye syndrome, infection, or inflammatory diseases of the gland. Early diagnosis is vital for protecting the ocular surface.
Inflammation of the lacrimal gland presents as an acute condition accompanied by pain, swelling, and redness. Appropriate antibiotic treatment and local care can provide rapid improvement. Untreated cases may become chronic and lead to more serious complications.
Although tumors of the lacrimal gland are rare, they may cause swelling and visual disturbances. Biopsy and further examinations may be required in such cases. Early intervention is extremely important for protecting eye health.
Dry eye syndrome is the most common consequence of lacrimal gland dysfunction. This problem can be controlled with artificial tear drops, medications, and lifestyle changes. Regular eye examinations are critical for preventing progressive damage.
Lacrimal gland disorders are divided into two main groups according to their origin and structure. This classification is the first step in establishing the correct diagnosis and treatment plan. Approximately 10% of masses found in the orbit originate from the lacrimal gland.
The main categories of these disorders are:
- Non-Epithelial Lesions: This group accounts for the majority of lacrimal gland masses, approximately 70% to 80%, and originates from supporting or inflammatory cells rather than the gland's own tissue. The most common cause in this category is inflammation of the gland, known as dacryoadenitis. Lymphoproliferative disorders such as lymphoma are also included in this group.
- Epithelial Tumors: These tumors originate from the epithelial cells lining the surface of the gland or forming its secretory ducts. These tumors are divided approximately equally into benign and malignant types.
In addition to this basic distinction, autoimmune diseases or the spread of cancer from another part of the body to the eye, known as metastasis, may also cause problems in the lacrimal gland. It should be remembered that not every swelling is a tumor. However, every swelling should be carefully evaluated by a specialist.
Dacryoadenitis is inflammation of the lacrimal gland and is the most common cause of enlargement of the gland. It may begin suddenly, which is known as acute dacryoadenitis, or persist for a long time, which is known as chronic dacryoadenitis. Acute dacryoadenitis is generally caused by an infection. Viral causes, particularly mumps or Epstein-Barr virus, are more common in young people. Bacterial infections may also cause this condition.
Chronic dacryoadenitis is usually a sign of an underlying systemic disease. Conditions such as sarcoidosis, Thyroid Eye Disease, or Graves' orbitopathy, and Sjögren's syndrome may cause chronic inflammation of the lacrimal gland.
The most common symptoms of dacryoadenitis include:
- Swelling in the outer part of the upper eyelid
- Redness and tenderness in the swollen area
- Pain in and around the eye
- Excessive tearing or discharge from the eye
- Development of a characteristic "S-shaped" curve in the eyelid
- Swelling of the lymph nodes in front of the ear
Treatment is planned according to the cause of the inflammation. Viral infections usually resolve on their own, while bacterial infections require antibiotics. In chronic cases associated with systemic disease, the underlying condition is treated and inflammation-suppressing medications such as corticosteroids are used.
Benign tumors are not cancerous, but they may grow in their location, place pressure on surrounding tissues, and cause significant problems. The two most common types are pleomorphic adenoma and dacryops.
- Pleomorphic Adenoma, or Benign Mixed Tumor: This is the most common benign tumor of the lacrimal gland. It generally occurs between the ages of 30 and 50, and its most important characteristic is its very slow growth. It is noticed as a painless, firm mass that grows slowly over months or even years. As it grows, it pushes the eyeball downward and inward. It has its own capsule, and treatment consists of surgically removing the tumor as a whole without rupturing this capsule. Rupture of the capsule or incomplete removal of the tumor carries a risk of recurrence and transformation into a malignant cancer over time. For this reason, when this tumor is suspected, direct removal is preferred instead of a diagnostic biopsy.
- Dacryops, or Lacrimal Gland Cyst: This is a fluid-filled sac caused by the obstruction of one of the tear ducts. It generally appears as a painless, mobile, bluish, and transparent swelling in the outer part of the upper eyelid. It is surgically removed if it causes a foreign body sensation, visual problems, or cosmetic discomfort.
Malignant tumors, or cancers, may also occur in the lacrimal gland. These tumors can grow rapidly and spread to surrounding tissues, nerves, bones, and even distant organs such as the lungs and brain, a process known as metastasis.
The most common malignant tumors of the lacrimal gland are as follows.
- Adenoid Cystic Carcinoma (ACC): This is the most common malignant type. It generally grows rapidly over a period of months. Its most distinctive feature is severe and persistent pain caused by its tendency to spread along nerve tissue. It is an aggressive tumor, and its treatment usually requires a comprehensive approach involving surgery, radiotherapy, and sometimes chemotherapy.
- Lacrimal Gland Lymphoma: This is a more slowly progressing type of cancer that generally occurs in people over the age of 60. It usually causes painless swelling. It may sometimes produce a typical appearance on the white part of the eye, or conjunctiva, known as a "salmon-colored patch." Treatment is generally not surgical. Methods such as radiotherapy or chemotherapy are used instead. Its prognosis is generally better than that of ACC.
Pain and rapid growth are important warning signs in malignant tumors. Any mass in the lacrimal gland area should therefore be taken seriously.
Lacrimal gland prolapse is the downward displacement of the gland due to loosening of the ligaments that hold it in place, usually with aging, rather than enlargement or disease of the gland itself. This condition is not a tumor but a structural change in position.
It generally does not cause symptoms, but some people may notice fullness or swelling in the outer part of the upper eyelid. This condition may be mistaken for a tumor, but there are important differences between them. A tumor is the growth of new tissue, whereas prolapse is the displacement of existing tissue. During examination, the prolapsed gland is generally soft and can be gently pushed back into place.
Treatment is only required if the prolapse causes cosmetic discomfort or affects the visual field. In this situation, the gland is secured back into its original position with sutures during eyelid surgery, or blepharoplasty. Removal of the gland is not preferred because it may cause dry eye.
Sometimes a problem in the lacrimal gland may be a sign of a more extensive disease affecting the entire body. Autoimmune or inflammatory diseases, in which the immune system attacks the body's own tissues, may target the lacrimal gland.
The main systemic diseases that may cause lacrimal gland disorders include:
- Sjögren's Syndrome
- Sarcoidosis
- IgG4-Related Disease
- Thyroid Eye Disease, or Graves' Orbitopathy
- Granulomatosis with Polyangiitis (GPA)
These conditions generally cause enlargement and inflammation of both lacrimal glands, accompanied by severe dry eye. Based on these findings, an ophthalmologist may suspect an underlying systemic disease and refer the patient to the relevant specialty, such as rheumatology.
Lacrimal gland disorders may manifest with various symptoms depending on the underlying cause. The presence of one or more of these symptoms requires consultation with a specialist.
The most common general symptoms include:
- Swelling or fullness in the outer part of the upper eyelid
- Forward protrusion of the eye, or proptosis
- Downward and inward displacement of the eyeball
- Drooping of the eyelid, or ptosis
- Persistent or severe eye pain
- Double vision, or diplopia
- Changes in tear volume, such as excessive tearing or dryness
- Blurred vision or visual field loss
- Facial asymmetry
An accurate diagnosis is the foundation of appropriate treatment. Lacrimal gland disorders are diagnosed through a systematic process consisting of several steps. This process begins with taking the patient's medical history. Details such as how long the symptoms have been present, how they have progressed, and whether pain is present are important.
Following a detailed medical history and clinical examination, the following diagnostic tests are generally used:
- Computed Tomography (CT)
- Magnetic Resonance Imaging (MRI)
- Ultrasound
- Biopsy and histopathological examination
- Blood tests, when systemic disease is suspected
Particularly when a tumor is suspected, imaging methods such as CT and MRI play a critical role in understanding the structure and boundaries of the lesion and its relationship with surrounding tissues. However, a definitive diagnosis is often established by taking a small sample from the suspicious tissue, known as a biopsy, and examining it in a pathology laboratory. This examination clearly determines whether the lesion is benign, malignant, or inflammatory.
There is no "one-size-fits-all treatment" for lacrimal gland disorders. The treatment plan is completely personalized according to the diagnosis.
Treatment options vary greatly depending on the source of the problem:
- Medications, including antibiotics, steroids, and immunosuppressants
- Surgical excision, or removal of the tumor or cyst
- Lacrimal gland pexy, or securing the gland in cases of prolapse
- Radiotherapy
- Chemotherapy
- Targeted biological agents
For example, bacterial inflammation is treated with antibiotics, while a benign tumor such as a pleomorphic adenoma must be completely removed surgically. Cancers such as lymphoma generally respond well to radiotherapy and chemotherapy. More aggressive cancers such as adenoid cystic carcinoma usually require much more comprehensive treatment involving a combination of surgery and radiotherapy.
When a malignant tumor is diagnosed, many factors affect the course and prognosis of the disease. These factors shape the treatment plan and expected outcomes.
The main factors affecting prognosis include:
- Histological type and grade of the tumor, or its aggressiveness
- Size of the tumor
- Stage at the time of diagnosis, or extent of spread
- Whether the tumor has spread to nerve or bone tissue
- Status of the surgical margins, or whether the tumor was completely removed
For example, a small tumor diagnosed at an early stage that has not spread to surrounding tissues has a much better prognosis than an advanced-stage tumor. Early diagnosis is therefore vital.
If you notice any of the following symptoms related to your eye health, it is important to consult an ophthalmologist without ignoring the condition.
Conditions requiring urgent medical attention include:
- Newly noticed or growing swelling in the upper eyelid
- A change in the position of the eye, such as protrusion or deviation
- Persistent or progressively worsening eye pain
- Sudden or persistent double vision
- Drooping of the eyelid
- Reduced or blurred vision
Although these symptoms do not always indicate a serious problem, evaluation of the underlying cause by a specialist is the safest way to ensure the early diagnosis and treatment of potentially serious conditions.
