Multicameral Steatocystoma Simplex of the Caruncle

Area of Science:

• Ophthalmology
• Dermatopathology

Background:

• Caruncular steatocystomas are rare benign tumors originating from the lacrimal caruncle.
• Previous case reports are limited, with few including detailed immunohistochemical analysis.

Observation:

• A unique case of a caruncular steatocystoma in a 68-year-old male is presented.
• The cyst exhibited characteristic sebaceous glands and sebocytes within the wall, arranged in multiple branching compartments.
• The cyst lining showed trichilemmal differentiation, lacking a keratohyalin granular layer.

Findings:

• Immunohistochemical analysis revealed similarities to previously reported caruncular steatomas.
• A notable exception was the positive expression of the trichilemmal marker, calretinin, in this case.
• The multi-compartment structure suggests development from a branching sebaceous gland duct.

Implications:

• This case expands the understanding of the histopathological variations in caruncular steatomas.
• The positive calretinin finding may aid in differentiating this entity from other adnexal tumors.
• Further research into the immunohistochemical profile of caruncular steatomas is warranted.