Case/year

[ref. No.]

Gender/age

Presentation

Size (mm)/CC contents/MRI characteristics

Ventricular size

CC dynamics/Follow-up

Ventricular size dynamics

Symptoms Dynamics

Mechanism of CC reduction

Motoyama Y, et al. 2002 [17]

♂/83

Progressive hydrocephalus

large (not reported)/homogeneous/- T1, ↓T2

+++

Rupture of the CC with preservation of the capsule /10 days

No

Regression followed by hydrocephalus after 6 months (refusal of CSF shunting surgery)

Unknown

Annamalai G, et al. 2008 [14]

♂/35

Asymptomatic finding (due to trauma)

5/homogeneous/

↑T1, ↓T2

++

(D > S)

Complete resorption/15 months

No

No

Unknown

Gbejuade H, et al. 2011 [15]

♂/65

F

8/homogeneous/

↓T2

N

Complete resorption/19 months

No

Regression

Unknown

Duncan G, et al. 2014 [16]

♀/22

Asymptomatic finding (due to migraine)

3/homogeneous/

↑T1

N

Increase of colloidal component up to 6 mm (↓T1) with subsequent decrease to 3 mm (↑T1)/50 months

No

No

Unknown

Bakhtevari MH, et al. 2015 [18]

♂/69

Progressive hydrocephalus; meningism

50 /homogeneous/

- T1, ↑Т2

+++

Rupture of CC with development of chemical meningitis; endoscopic removal of CC /42 months

++

(slightly less than before surgery)

Regression

Unknown

Peeters S, et al. 2016 [20]

♀/46

Asymptomatic finding (due to dysmenorrhea)

0.675 cm³/homogeneous/

↑T1, ↓T2

N

Colloid content increase to 2.852 cm³ (↓T1, ↑Т2) with subsequent decrease to 0.07-cm³ (↑T1)/

36 months

No

Headaches with аmnestic and mental disorders (during size increase of CC) with subsequent regression

Unknown

Turel M, et al. 2017 [19]

♀/45

Asymptomatic finding (due to nonspecific headaches, vertigo)

11 /heterogeneous/

↑T1 with ↓T1 center;

↑T2 with ↓T2 center

N

Complete resorption/

24 months

Slightly narrowed

No

Unknown

Agrawal D, et al. 2020 [5]

♂/21

Asymptomatic finding (familial form)

6 (CT)

N

Increase of colloidal component up to 8 mm (↑Т2) with subsequent decrease to 4 mm (↑Т2)/38 months

Slightly expanded with a subsequent narrowing

No

Unknown

Present case

♀/28

Headaches, occlusive seizures

14 /heterogeneous /

↑T1 with - T1 center;

↑Т2 with ↓T2 center

++

Rupture of the CC with preservation of the dense component/108 months

Narrowed

Regression

Hydrodynamic impact