Occipital aneurysmal bone cyst

Giant Aneurysmal Bone Cyst of the Anterior Cranial Fossa and Paranasal Sinuses Presenting in Pregnancy: Case Report and Literature Review

Background and Purpose Aneurysmal bone cysts (ABCs) rarely involve the cranium and have seldom been reported in pregnancy. Clinical Presentation We describe a case of a 28-year-old woman who presented at 37 weeks of gestation with 3 months of gradually worsening vision, 10 months of proptosis, and restricted ocular motility on the left. Brain imaging revealed a multicystic enhancing mass measuring 5.9 × 5.3 × 3.7 cm, centered on the cribriform plate on the left, extending into the anterior cranial fossa superiorly as well as the left nasal cavity, maxillary, sphenoid, and frontal sinuses. Her clinical course is described in detail; 3-month postoperative imaging demonstrated no residual mass. Conclusion A literature review revealed five previous cases of ABCs associated with pregnancy. We report a rare case of a giant ABC of fibrous dysplasia involving the paranasal sinuses and anterior cranial fossa. We postulate on the possible influence of pregnancy on the clinical course.

Giant pediatric aneurysmal bone cysts of the occipital bone: case report and review of the literature

Cranial aneurysmal bone cysts are uncommon. Cranial aneurysmal bone cysts of the occipital bone are exceedingly rare. A 2-year-old toddler with this rare cyst presented with a large space-occupying lesion of the posterior fossa, with cerebellar tonsillar herniation. The patient experienced complete recovery after total excision of the lesion. We review the literature regarding this rare presentation, and discuss the origin, pathogenesis, pathologic features, imaging characteristics, and treatment of cranial aneurysmal bone cysts.