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Ophthalmology – Chalazion
A chalazion is a common eyelid condition characterized by a localized, chronic inflammatory nodule of the posterior eyelid caused by obstruction of a meibomian (sebaceous) gland. It is sometimes referred to as an internal hordeolum, although a true hordeolum (stye) is typically an acute infectious process. In contrast, a chalazion is usually sterile and represents a lipogranulomatous inflammatory reaction. An external hordeolum involves the glands of Zeis or Moll at the eyelid margin, whereas a chalazion arises deeper within the tarsal plate.
Chalazia are the most common eyelid lesions encountered in clinical practice. Risk factors include poor eyelid hygiene, acne rosacea, and dry eye syndrome. These conditions contribute to dysfunction of the meibomian glands, leading to blockage of gland openings and retention of sebaceous secretions. Preventive strategies focus on maintaining good lid hygiene and managing associated conditions such as rosacea and dry eye.
The pathophysiology involves obstruction of the meibomian gland orifice, preventing normal secretion of lipid material onto the tear film. This retained material leaks into surrounding tissue, triggering a granulomatous inflammatory response. Although bacteria such as Staphylococcus aureus may play a role in initial blockage or inflammation, the lesion itself is typically noninfectious.
Clinically, patients may initially present with a tender, red swelling of the eyelid in the acute phase. Over time, this evolves into a painless, firm, well-defined nodule within the eyelid. Some patients may notice blurred vision due to induced astigmatism from pressure on the cornea. Examination typically reveals a localized eyelid lump, blocked meibomian gland orifices, and sometimes associated blepharitis or rosacea.
Diagnosis is primarily clinical. Imaging such as CT scan is only indicated if complications like orbital cellulitis are suspected. Importantly, recurrent or atypical lesions should be biopsied to exclude sebaceous (meibomian gland) carcinoma. Histologically, chalazia show a granulomatous reaction with lipid-laden macrophages and multinucleated giant cells.
Management begins conservatively. First-line treatment includes warm compresses applied several times daily to promote drainage, along with topical antibiotics or mild steroid-antibiotic combinations if inflammation is significant. If the lesion persists, second-line options include incision and curettage or intralesional corticosteroid injection (e.g., triamcinolone). Recurrent cases warrant further evaluation and possible biopsy.
The prognosis is excellent, with most lesions resolving either spontaneously or with treatment. However, complications such as eyelid scarring or entropion can occur rarely. A key clinical point is that recurrent chalazia should always raise suspicion for underlying malignancy, particularly meibomian gland carcinoma, and must be investigated appropriately.
A chalazion is a common eyelid condition characterized by a localized, chronic inflammatory nodule of the posterior eyelid caused by obstruction of a meibomian (sebaceous) gland. It is sometimes referred to as an internal hordeolum, although a true hordeolum (stye) is typically an acute infectious process. In contrast, a chalazion is usually sterile and represents a lipogranulomatous inflammatory reaction. An external hordeolum involves the glands of Zeis or Moll at the eyelid margin, whereas a chalazion arises deeper within the tarsal plate.
Chalazia are the most common eyelid lesions encountered in clinical practice. Risk factors include poor eyelid hygiene, acne rosacea, and dry eye syndrome. These conditions contribute to dysfunction of the meibomian glands, leading to blockage of gland openings and retention of sebaceous secretions. Preventive strategies focus on maintaining good lid hygiene and managing associated conditions such as rosacea and dry eye.
The pathophysiology involves obstruction of the meibomian gland orifice, preventing normal secretion of lipid material onto the tear film. This retained material leaks into surrounding tissue, triggering a granulomatous inflammatory response. Although bacteria such as Staphylococcus aureus may play a role in initial blockage or inflammation, the lesion itself is typically noninfectious.
Clinically, patients may initially present with a tender, red swelling of the eyelid in the acute phase. Over time, this evolves into a painless, firm, well-defined nodule within the eyelid. Some patients may notice blurred vision due to induced astigmatism from pressure on the cornea. Examination typically reveals a localized eyelid lump, blocked meibomian gland orifices, and sometimes associated blepharitis or rosacea.
Diagnosis is primarily clinical. Imaging such as CT scan is only indicated if complications like orbital cellulitis are suspected. Importantly, recurrent or atypical lesions should be biopsied to exclude sebaceous (meibomian gland) carcinoma. Histologically, chalazia show a granulomatous reaction with lipid-laden macrophages and multinucleated giant cells.
Management begins conservatively. First-line treatment includes warm compresses applied several times daily to promote drainage, along with topical antibiotics or mild steroid-antibiotic combinations if inflammation is significant. If the lesion persists, second-line options include incision and curettage or intralesional corticosteroid injection (e.g., triamcinolone). Recurrent cases warrant further evaluation and possible biopsy.
The prognosis is excellent, with most lesions resolving either spontaneously or with treatment. However, complications such as eyelid scarring or entropion can occur rarely. A key clinical point is that recurrent chalazia should always raise suspicion for underlying malignancy, particularly meibomian gland carcinoma, and must be investigated appropriately.
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