Diagnosis:
Usually by MRI imaging, but pathology is confirmatory
Findings on investigations:
MRI:
- Near fontanelle, fourth ventricle,
- Heterogenous signal
Pathology:
Histology:
- Cyst lined by epithelium, adnexial/dermal tissue (hair & sweat glands) i.e. both layers of the skin
- Cyst filled with keratinised material
Treatment:
Surgical resection