A 5-year-old child presents with a bluish, compressible swelling in the superotemporal orbit present since birth. It is non-tender, does not transilluminate, and is fixed to the underlying bone at the frontozygomatic suture. CT shows a well-circumscribed lesion with a bony cavity. What is the diagnosis?
- A Capillary hemangioma
- B Rhabdomyosarcoma
- C Dermoid cyst ✓
- D Lymphangioma
Correct answer: C. Dermoid cyst
Explanation
Dermoid cyst is a choristoma presenting in childhood as a painless, firm, non-pulsatile superotemporal mass fixed to the periosteum at the frontozygomatic suture. It may have a bony cavity on imaging. Capillary hemangioma appears after birth, grows rapidly, and is compressible but not fixed to bone. Rhabdomyosarcoma is a rapidly progressive malignant tumor. Lymphangioma is a diffuse, non-localized vascular malformation that does not create a bony cavity.
Reference: Kanski's Clinical Ophthalmology, 9th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.