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Ophthalmology – Dacryocystitis
Dacryocystitis is an inflammatory condition of the lacrimal sac, most commonly caused by infection and usually occurring as a result of nasolacrimal duct obstruction (NLDO). It may present in acute, chronic, or congenital forms and often leads to recurrent episodes if the underlying obstruction is not addressed. Structural predispositions such as a brachycephalic head shape or a narrow face with a flat nasal bridge may increase susceptibility, although no preventive measures exist prior to the first episode.
The pathophysiology involves stagnation of tears within the lacrimal sac due to obstruction. Normally, the lacrimal drainage system is colonized with bacteria, but continuous tear flow prevents infection. When this flow is blocked, bacteria proliferate, leading to inflammation and infection of the lacrimal sac. Common causative organisms include Staphylococcus epidermidis, Staphylococcus aureus, Streptococcus species, Pneumococcus, as well as gram-negative organisms and anaerobes. Causes of obstruction may include structural abnormalities, nasal inflammation, trauma (such as nasal fractures), punctal plugs, tumors, or cysts.
Clinically, patients typically present with pain, redness, and swelling over the medial canthal region, often accompanied by epiphora (excess tearing). On examination, there is tenderness over the lacrimal sac, a firm swelling below the medial canthus, and purulent discharge from the puncta, especially when pressure is applied. In chronic cases, a dacryocutaneous fistula may develop with spontaneous drainage. Severe or untreated cases can progress to orbital cellulitis, which may present with decreased vision, afferent pupillary defect, and restricted eye movements.
Diagnosis is primarily clinical, based on characteristic history and examination findings. In atypical or refractory cases, further evaluation may be required. Laboratory tests such as CBC or inflammatory markers may be considered if systemic or inflammatory causes are suspected. Cultures of discharge can help guide antibiotic therapy in resistant cases. Imaging, such as CT scanning, may be used to assess structural abnormalities or complications. Additional diagnostic tools like dacryocystography, dacryoscintigraphy, or nasal endoscopy may be used to evaluate the anatomy of the lacrimal drainage system.
Management initially focuses on treating the infection. This includes oral antibiotics, warm compresses, and topical antibiotic drops or ointments. In more severe cases or when there is concern for orbital cellulitis, intravenous antibiotics are required. However, definitive treatment involves addressing the underlying obstruction. Once the acute infection has resolved, a dacryocystorhinostomy (DCR) is typically performed to create a new drainage pathway between the lacrimal sac and the nasal cavity, thereby preventing recurrence. Both external and endonasal approaches are effective, with similar success rates.
The prognosis for dacryocystitis is generally excellent with appropriate treatment, particularly when the underlying obstruction is corrected. However, complications can occur if the condition is not managed promptly. These include orbital cellulitis, which can threaten vision, and in rare severe cases, progression to sepsis and even death. Early recognition and treatment are therefore essential to prevent serious outcomes.
Dacryocystitis is an inflammatory condition of the lacrimal sac, most commonly caused by infection and usually occurring as a result of nasolacrimal duct obstruction (NLDO). It may present in acute, chronic, or congenital forms and often leads to recurrent episodes if the underlying obstruction is not addressed. Structural predispositions such as a brachycephalic head shape or a narrow face with a flat nasal bridge may increase susceptibility, although no preventive measures exist prior to the first episode.
The pathophysiology involves stagnation of tears within the lacrimal sac due to obstruction. Normally, the lacrimal drainage system is colonized with bacteria, but continuous tear flow prevents infection. When this flow is blocked, bacteria proliferate, leading to inflammation and infection of the lacrimal sac. Common causative organisms include Staphylococcus epidermidis, Staphylococcus aureus, Streptococcus species, Pneumococcus, as well as gram-negative organisms and anaerobes. Causes of obstruction may include structural abnormalities, nasal inflammation, trauma (such as nasal fractures), punctal plugs, tumors, or cysts.
Clinically, patients typically present with pain, redness, and swelling over the medial canthal region, often accompanied by epiphora (excess tearing). On examination, there is tenderness over the lacrimal sac, a firm swelling below the medial canthus, and purulent discharge from the puncta, especially when pressure is applied. In chronic cases, a dacryocutaneous fistula may develop with spontaneous drainage. Severe or untreated cases can progress to orbital cellulitis, which may present with decreased vision, afferent pupillary defect, and restricted eye movements.
Diagnosis is primarily clinical, based on characteristic history and examination findings. In atypical or refractory cases, further evaluation may be required. Laboratory tests such as CBC or inflammatory markers may be considered if systemic or inflammatory causes are suspected. Cultures of discharge can help guide antibiotic therapy in resistant cases. Imaging, such as CT scanning, may be used to assess structural abnormalities or complications. Additional diagnostic tools like dacryocystography, dacryoscintigraphy, or nasal endoscopy may be used to evaluate the anatomy of the lacrimal drainage system.
Management initially focuses on treating the infection. This includes oral antibiotics, warm compresses, and topical antibiotic drops or ointments. In more severe cases or when there is concern for orbital cellulitis, intravenous antibiotics are required. However, definitive treatment involves addressing the underlying obstruction. Once the acute infection has resolved, a dacryocystorhinostomy (DCR) is typically performed to create a new drainage pathway between the lacrimal sac and the nasal cavity, thereby preventing recurrence. Both external and endonasal approaches are effective, with similar success rates.
The prognosis for dacryocystitis is generally excellent with appropriate treatment, particularly when the underlying obstruction is corrected. However, complications can occur if the condition is not managed promptly. These include orbital cellulitis, which can threaten vision, and in rare severe cases, progression to sepsis and even death. Early recognition and treatment are therefore essential to prevent serious outcomes.
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