Spontaneous Idiopathic Cerebrospinal Fluid Rhinorrhea

Spontaneous Cerebrospinal Fluid Rhinorrhea in a Patient With Breast Cancer

Despite the well documented increased risk of osteopenia in patients with breast cancer during chemotherapy and endocrine therapy, spontaneous cerebrospinal fluid rhinorrhea (CSFR) is still rare. The authors present a case of spontaneous CSFR that occurred during chemotherapy and endocrine therapy for breast cancer. The patient underwent a repair using myofascia and adipose tissue and was started on mannitol. There was no recurrence at 1-year follow-up. Therefore, clinicians should pay attention to the possibility of CSFR in patients with breast cancer, to avoid misdiagnosis.

Abducens Nerve Paralysis Induced by a Primary Solitary Sphenoid Sinus Mucocele with Broad Osseous Thinning at the Cranial Base

Primary solitary sphenoid sinus mucocele is rare, generally presenting with headaches or eye symptoms at the anatomical site. We report the case of a 39-year-old woman incidentally diagnosed with sphenoid sinus mucocele during a complete medical checkup. Imaging revealed that the cystic wall had developed from the rear sphenoid sinus and had spread expansively to diminish the clivus; however, no symptoms were reported, and the patient was managed with close observation. During the follow-up period, diplopia developed suddenly due to isolated left-sided abducens nerve paralysis. An endoscopic endonasal approach was used to open the frontal cystic wall, and fascia lata and fat were used for cranial base reinforcement to avoid future cerebrospinal fluid leakage, resulting in improvement during the early stages of follow-up. Treatment options for sphenoid sinus mucoceles include close observation or surgery. In our case, we chose surgery because of an acute symptomatic manifestation during observation.