Vernal keratoconjunctivitis: Difference between revisions
CSV import |
CSV import |
||
| Line 2: | Line 2: | ||
{{Use dmy dates|date=October 2023}} | {{Use dmy dates|date=October 2023}} | ||
'''Vernal keratoconjunctivitis''' (VKC) is a chronic, bilateral inflammation of the conjunctiva and cornea. It is a | ==Vernal Keratoconjunctivitis== | ||
[[File:Vernal.jpg|thumb|right|A patient with vernal keratoconjunctivitis showing characteristic symptoms.]] | |||
'''Vernal keratoconjunctivitis''' (VKC) is a chronic, bilateral inflammation of the conjunctiva and cornea. It is a form of [[allergic conjunctivitis]] that primarily affects children and young adults, particularly males, and is more prevalent in warm, dry climates. | |||
==Signs and Symptoms== | |||
VKC is characterized by intense [[itching]], [[photophobia]], [[tearing]], and a thick, ropy [[discharge]]. Patients often experience a burning sensation and a feeling of a foreign body in the eye. The condition is typically seasonal, with exacerbations in the spring and summer months. | |||
===Conjunctival Changes=== | |||
The conjunctiva may exhibit [[papillae]] on the upper tarsal conjunctiva, which can become large and cobblestone-like. Limbal papillae may also be present, often associated with [[Horner-Trantas dots]], which are collections of degenerated epithelial cells and eosinophils. | |||
== | ===Corneal Involvement=== | ||
Corneal involvement can lead to [[keratitis]], with the potential for [[corneal ulceration]] and [[pannus]] formation. In severe cases, [[shield ulcers]] may develop, which can significantly impact vision. | |||
==Pathophysiology== | ==Pathophysiology== | ||
VKC is an | VKC is an [[IgE]]-mediated hypersensitivity reaction. The condition involves a complex interplay of [[mast cells]], [[eosinophils]], and [[T-lymphocytes]]. The release of inflammatory mediators such as [[histamine]] and [[cytokines]] contributes to the symptoms and tissue changes observed in VKC. | ||
==Diagnosis== | ==Diagnosis== | ||
Diagnosis | Diagnosis is primarily clinical, based on the characteristic signs and symptoms. A detailed patient history and examination of the conjunctiva and cornea are essential. In some cases, conjunctival scrapings may be performed to identify eosinophils. | ||
== | ==Management== | ||
Management of VKC involves avoiding allergens and using | Management of VKC involves avoiding known allergens and using pharmacological treatments to control symptoms. [[Topical antihistamines]], [[mast cell stabilizers]], and [[nonsteroidal anti-inflammatory drugs]] (NSAIDs) are commonly used. In more severe cases, [[topical corticosteroids]] or [[immunomodulatory agents]] such as [[cyclosporine]] may be necessary. | ||
==Prognosis== | ==Prognosis== | ||
The prognosis for VKC is generally good, with most patients experiencing a reduction in symptoms as they age. However, | The prognosis for VKC is generally good, with most patients experiencing a reduction in symptoms as they age. However, ongoing management is often required to prevent complications and maintain quality of life. | ||
==Related pages== | ==Related pages== | ||
* [[Allergic conjunctivitis]] | * [[Allergic conjunctivitis]] | ||
* [[ | * [[Keratitis]] | ||
* [[ | * [[Conjunctivitis]] | ||
* [[Corneal ulcer]] | |||
[[Category:Eye diseases]] | [[Category:Eye diseases]] | ||
[[Category:Allergology]] | [[Category:Allergology]] | ||
Revision as of 11:12, 15 February 2025
A chronic allergic eye disease
Vernal Keratoconjunctivitis
Vernal keratoconjunctivitis (VKC) is a chronic, bilateral inflammation of the conjunctiva and cornea. It is a form of allergic conjunctivitis that primarily affects children and young adults, particularly males, and is more prevalent in warm, dry climates.
Signs and Symptoms
VKC is characterized by intense itching, photophobia, tearing, and a thick, ropy discharge. Patients often experience a burning sensation and a feeling of a foreign body in the eye. The condition is typically seasonal, with exacerbations in the spring and summer months.
Conjunctival Changes
The conjunctiva may exhibit papillae on the upper tarsal conjunctiva, which can become large and cobblestone-like. Limbal papillae may also be present, often associated with Horner-Trantas dots, which are collections of degenerated epithelial cells and eosinophils.
Corneal Involvement
Corneal involvement can lead to keratitis, with the potential for corneal ulceration and pannus formation. In severe cases, shield ulcers may develop, which can significantly impact vision.
Pathophysiology
VKC is an IgE-mediated hypersensitivity reaction. The condition involves a complex interplay of mast cells, eosinophils, and T-lymphocytes. The release of inflammatory mediators such as histamine and cytokines contributes to the symptoms and tissue changes observed in VKC.
Diagnosis
Diagnosis is primarily clinical, based on the characteristic signs and symptoms. A detailed patient history and examination of the conjunctiva and cornea are essential. In some cases, conjunctival scrapings may be performed to identify eosinophils.
Management
Management of VKC involves avoiding known allergens and using pharmacological treatments to control symptoms. Topical antihistamines, mast cell stabilizers, and nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly used. In more severe cases, topical corticosteroids or immunomodulatory agents such as cyclosporine may be necessary.
Prognosis
The prognosis for VKC is generally good, with most patients experiencing a reduction in symptoms as they age. However, ongoing management is often required to prevent complications and maintain quality of life.
