Congenital cavernous sinus cystic teratoma

Area of Science:

• Neuro-oncology
• Pediatric Neurosurgery
• Pathology

Background:

• Teratomas are rare intracranial tumors, typically found in midline regions.
• Cavernous sinus teratomas are exceptionally rare, particularly congenital cystic variants.

Observation:

• A three-month-old infant presented with irritability and poor feeding, found to have a rapidly growing cystic mass in the right cavernous sinus.
• MRI revealed a large cystic tumor extending into the pterygopalatine fossa, with heterogeneous enhancement and mixed signal intensity suggesting diverse tissue components.
• Initial presumptive diagnosis was cystic glioma due to the predominantly cystic nature and location.

Findings:

• Surgical exploration and resection via a frontotemporal approach revealed a mature teratoma composed of fat, muscle, and brain-like tissue.
• The lesion completely occupied the cavernous sinus, displacing neural structures.
• Pathological confirmation identified it as a mature teratoma, with no recurrence observed post-operatively.

Implications:

• This report describes the first congenital, rapidly growing cystic teratoma of the cavernous sinus.
• Complete resection is achievable using standard microsurgical techniques, even in this challenging location.
• Highlights the importance of considering teratomas in the differential diagnosis of pediatric cavernous sinus masses.