Diagnosis of anterior chamber metastasis by serologic marker found during anterior chamber paracentesis

Area of Science:

• Ophthalmology
• Oncology
• Medical Diagnostics

Background:

• Anterior uveitis can be a challenging condition, sometimes unresponsive to standard treatments.
• Germ cell tumors, including embryonal carcinoma and seminoma, can metastasize to various organs.
• Ocular metastasis from solid tumors is rare but can present with ocular inflammation.

Observation:

• A 29-year-old male patient presented with severe anterior uveitis refractory to conventional therapies.
• The patient had recently undergone chemotherapy for a mixed germ cell tumor with initial success.
• Initial anterior chamber paracentesis failed to identify malignant cells.

Findings:

• Elevated levels of the tumor marker human chorionic gonadotropin-beta subunit were detected in the aqueous humor.
• This finding confirmed intraocular metastasis to the anterior chamber of the eye.
• The diagnosis of ocular metastasis was established despite negative cytology from paracentesis.

Implications:

• Human chorionic gonadotropin-beta subunit measurement is a valuable tool for diagnosing ocular metastasis in specific cancer patients.
• This case highlights the importance of considering systemic malignancy in unexplained ocular inflammation.
• Early detection of ocular metastasis can guide further oncological management and improve patient outcomes.