Clinical imaging · 2026
Dynamic nature of choroid fissure cysts.
СтатьяНазвание и аннотация: Перевод в очереди
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Mahajan Amit, Siddique Aashir, Bronen Richard A
Аннотация
BACKGROUND: Choroidal fissure cysts (CFCs) are considered benign, static lesions within the brain's choroidal fissure. However, their behavior over time remains incompletely understood.
OBJECTIVE: To investigate longitudinal changes in CFC size and morphology and assess associated hippocampal mass effect.
METHODS: This retrospective longitudinal study included patients with CFCs measuring ≥2 mm on initial magnetic resonance imaging (MRI) who also had follow-up MRI. Changes in cyst size were categorized as increase, decrease, or no change, with significant change defined as ≥0.2 mL from baseline. To account for the confounding effects of rapid brain growth, patients younger than 5 years were analyzed separately from those aged 5 years and older.
RESULTS: A total of 42 patients with 43 cysts were included. Among 35 patients aged ≥5 years (mean age, 18 years; range, 5-54 years), mean cyst volume was 1.1 mL, with diameters ranging from 3 to 31 mm. Appreciable hippocampal mass effect was present in 21 cases (60%). Mean follow-up interval was 5.7 years (range, 1 month to 23.6 years). Cyst size increased in 2 cases (6%), decreased in 11 (31%), and remained stable in 22 (63%). In patients younger than 5 years (7 patients, 8 cysts), cysts increased in 3 (38%), decreased in 3 (38%), and remained unchanged in 2 (25%).
CONCLUSION: CFCs can demonstrate significant interval size changes, challenging the traditional view of these lesions as static. More than one-third of cysts in patients aged ≥5 years changed over time, and appreciable hippocampal mass effect was common.
OBJECTIVE: To investigate longitudinal changes in CFC size and morphology and assess associated hippocampal mass effect.
METHODS: This retrospective longitudinal study included patients with CFCs measuring ≥2 mm on initial magnetic resonance imaging (MRI) who also had follow-up MRI. Changes in cyst size were categorized as increase, decrease, or no change, with significant change defined as ≥0.2 mL from baseline. To account for the confounding effects of rapid brain growth, patients younger than 5 years were analyzed separately from those aged 5 years and older.
RESULTS: A total of 42 patients with 43 cysts were included. Among 35 patients aged ≥5 years (mean age, 18 years; range, 5-54 years), mean cyst volume was 1.1 mL, with diameters ranging from 3 to 31 mm. Appreciable hippocampal mass effect was present in 21 cases (60%). Mean follow-up interval was 5.7 years (range, 1 month to 23.6 years). Cyst size increased in 2 cases (6%), decreased in 11 (31%), and remained stable in 22 (63%). In patients younger than 5 years (7 patients, 8 cysts), cysts increased in 3 (38%), decreased in 3 (38%), and remained unchanged in 2 (25%).
CONCLUSION: CFCs can demonstrate significant interval size changes, challenging the traditional view of these lesions as static. More than one-third of cysts in patients aged ≥5 years changed over time, and appreciable hippocampal mass effect was common.