Fluid-Filled Cyst of the Medial Canthus: Radiological Diagnosis of a Hidrocystoma

Apocrine hidrocystomas are rare, benign tumors originating from sweat glands, typically either eccrine or apocrine. We present the case of a 52-year-old woman with no notable medical history, who experienced recurrent dacryocystitis. Imaging of the orbit revealed a well-defined, fluid-filled cystic lesion located at the medial canthus. Over time, the lesion led to significant disruption of lacrimal drainage function. This case highlights the clinical, etiological, and histopathological aspects of apocrine hidrocystomas, and reviews available management strategies, with surgical excision being the mainstay of treatment. Its unusual presentation, size, and impact on tear drainage make this case particularly noteworthy.