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Ophthalmology – Dacryocele
A dacryocele is a distension of the lacrimal sac that typically presents in newborns or early infancy due to congenital obstruction of the nasolacrimal drainage system. It is also referred to as dacryocystocele or lacrimal sac mucocele. Although uncommon, it is an important condition because it can lead to infection or airway compromise. Most cases are sporadic, though rare familial occurrences have been described.
The underlying mechanism involves a dual obstruction of the lacrimal drainage pathway. There is distal blockage at the valve of Hasner combined with proximal functional obstruction at the valve of Rosenmüller. This prevents both forward and backward flow of tears and secretions, leading to accumulation within the lacrimal sac and progressive cystic enlargement. In some infants, an associated intranasal cyst may develop, further worsening obstruction and potentially causing nasal airway compromise.
Clinically, dacryocele presents as a firm, bluish swelling below the medial canthus in a neonate. The mass is typically non-mobile and may cause upward displacement of the lower eyelid. It may occur on one or both sides. In uncomplicated cases, it is painless, but secondary infection can lead to redness, tenderness, and swelling, indicating dacryocystitis or preseptal cellulitis. In severe cases, particularly when an intranasal cyst is present, the infant may develop respiratory distress, as newborns are obligate nasal breathers. Feeding difficulties may also be observed.
Diagnosis is primarily clinical, based on the characteristic appearance. Gentle pressure over the swelling may produce mucoid discharge from the puncta or into the nasal cavity, which supports the diagnosis. If infection is suspected, laboratory investigations such as complete blood count and cultures may be necessary. Imaging studies like CT or MRI are reserved for cases with suspected nasal obstruction or to evaluate for an intranasal cyst, and ENT consultation may be required.
The differential diagnosis includes other medial canthal masses such as capillary hemangioma, dermoid cyst, and encephalocele. These can usually be distinguished based on their clinical features, including color, consistency, mobility, and location.
Initial management often involves conservative treatment with gentle digital massage, which may decompress the cyst. If infection is present, systemic antibiotics are required due to the risk of serious complications. However, many cases, especially those with infection or airway compromise, require surgical intervention. The definitive treatment is probing and irrigation of the nasolacrimal duct, often performed under general anesthesia. Nasal endoscopy may be used to identify and treat associated intranasal cysts, improving success rates.
The prognosis is excellent, with approximately 99% resolution following appropriate surgical management, particularly when nasal endoscopy is utilized. Nevertheless, some infants may later develop typical nasolacrimal duct obstruction.
Complications, although uncommon, include recurrent obstruction, fistula formation if improperly drained externally, and infections such as dacryocystitis, preseptal cellulitis, or even sepsis and meningitis. Parents should be educated on proper massage techniques and advised to watch for warning signs such as redness, swelling, fever, or breathing and feeding difficulties, which require urgent medical evaluation.
A dacryocele is a distension of the lacrimal sac that typically presents in newborns or early infancy due to congenital obstruction of the nasolacrimal drainage system. It is also referred to as dacryocystocele or lacrimal sac mucocele. Although uncommon, it is an important condition because it can lead to infection or airway compromise. Most cases are sporadic, though rare familial occurrences have been described.
The underlying mechanism involves a dual obstruction of the lacrimal drainage pathway. There is distal blockage at the valve of Hasner combined with proximal functional obstruction at the valve of Rosenmüller. This prevents both forward and backward flow of tears and secretions, leading to accumulation within the lacrimal sac and progressive cystic enlargement. In some infants, an associated intranasal cyst may develop, further worsening obstruction and potentially causing nasal airway compromise.
Clinically, dacryocele presents as a firm, bluish swelling below the medial canthus in a neonate. The mass is typically non-mobile and may cause upward displacement of the lower eyelid. It may occur on one or both sides. In uncomplicated cases, it is painless, but secondary infection can lead to redness, tenderness, and swelling, indicating dacryocystitis or preseptal cellulitis. In severe cases, particularly when an intranasal cyst is present, the infant may develop respiratory distress, as newborns are obligate nasal breathers. Feeding difficulties may also be observed.
Diagnosis is primarily clinical, based on the characteristic appearance. Gentle pressure over the swelling may produce mucoid discharge from the puncta or into the nasal cavity, which supports the diagnosis. If infection is suspected, laboratory investigations such as complete blood count and cultures may be necessary. Imaging studies like CT or MRI are reserved for cases with suspected nasal obstruction or to evaluate for an intranasal cyst, and ENT consultation may be required.
The differential diagnosis includes other medial canthal masses such as capillary hemangioma, dermoid cyst, and encephalocele. These can usually be distinguished based on their clinical features, including color, consistency, mobility, and location.
Initial management often involves conservative treatment with gentle digital massage, which may decompress the cyst. If infection is present, systemic antibiotics are required due to the risk of serious complications. However, many cases, especially those with infection or airway compromise, require surgical intervention. The definitive treatment is probing and irrigation of the nasolacrimal duct, often performed under general anesthesia. Nasal endoscopy may be used to identify and treat associated intranasal cysts, improving success rates.
The prognosis is excellent, with approximately 99% resolution following appropriate surgical management, particularly when nasal endoscopy is utilized. Nevertheless, some infants may later develop typical nasolacrimal duct obstruction.
Complications, although uncommon, include recurrent obstruction, fistula formation if improperly drained externally, and infections such as dacryocystitis, preseptal cellulitis, or even sepsis and meningitis. Parents should be educated on proper massage techniques and advised to watch for warning signs such as redness, swelling, fever, or breathing and feeding difficulties, which require urgent medical evaluation.
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