Orbital histiocytic sarcoma in a 2-year-old child

Area of Science:

• Hematology
• Oncology
• Ophthalmology

Background:

• Histiocytic sarcoma (HS) is a rare hematologic malignancy.
• HS commonly affects the skin, GI tract, and lymph nodes.
• Head and neck involvement is infrequent, with orbital cases being exceptionally rare.

Observation:

• A 2-year-old girl presented with a two-week history of left lower eyelid swelling.
• Imaging revealed a large inferior orbital mass with significant bony destruction and sinus extension.
• Biopsy confirmed the mass as histiocytic sarcoma.

Findings:

• This case represents the first reported instance of orbital histiocytic sarcoma in a child.
• The presentation with eyelid swelling is unusual for this rare malignancy.
• Pathologic analysis confirmed classic features of HS.

Implications:

• This case highlights the importance of considering rare diagnoses in pediatric orbital masses.
• Early recognition and diagnosis of orbital HS are crucial for appropriate management.
• Further research into pediatric orbital malignancies is warranted.