Two cases of persistent falcine and occipital sinuses

Abstract

Background: The coexistence of falcine and occipital sinuses is rare and its natural course has not been reported. Case reports: Two patients with persistent falcine and occipital sinuses are described. Both patients had straight sinuses. In one, both the transverse and sigmoid sinuses were hypoplastic and the patient had an acquired Chiari I malformation. The other patient had no other venous anomalies and had a normal posterior cranial fossa. Conclusion:The coexistence of falcine and occipital sinuses can lead to an acquired Chiari I malformation. These cases suggest the importance of checking other venous and brain anomalies in this situation.

Reply to: “Letter: Two cases of persistent falcine and occipital sinuses”

“…We appreciate the comments of Balak Naci [1] on our manuscript, ''Two cases of persistent falcine and occipital sinuses" [2]. He pointed out that an occipital sinus is commonly encountered during autopsy (>60%) [3], and emphasized the importance of checking for an occipital sinus prior to a neurosurgical procedure.…”

Two cases of persistent falcine and occipital sinuses

“…A clear knowledge of cerebrospinal fluid (CSF) pathways is still lacking [1,2]. The results of the article, entitled ''Two cases of persistent falcine and occipital sinuses" by Inui et al [3] and recently published in Brain & Development (2020), indicate some important clues in better understanding of the pathophysiology of the disorders which can be associated with disturbances of the CSF circulation. As the authors stated, an acquired Chiari Ⅰ malformation can be associated with a pressure gradient across the cranial and spinal compartments.…”