Third

Ventricle

Meningioma

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YA-YEN

LEE,’

Mimicking

SHU-REN

LIN,’

AND

Although meningiomas occur at any age, they are predominantly adult tumors. In a review of a 2,620 case series of intracranial tumors in childhood, the incidence of meningioma was estimated at 1 [1], in contrast to that of adults, which is around 10%-15% [2-5]. Intraventnicular meningiomas are very rare. The major meninseries,

by Cushing

and

Eisenhardt

[2],

region

medium

Olivecrona

nerves

removed.

There

was

side.

Thorough

evaluation

did

not

reveal

Received October 13, 1978; accepted ‘Department of Radiology. University S.

A. 2

after revision

were

noted.

December

of Rochester

Medical

was

noted

in the

choroid

plexus

(fig. 1C). Cerebral angiognaphy revealed distal posterior medial choroidal artery

attached to the anterior superior of the third ventricle, was found

of the

portion of the and completely (fig. ex-

Although

tumors

ventricle

arising

are

rare,

and radiographically. structing the flow vomiting,

meningothelial

visual

from

they

the

evoke

anterior

interest

Their symptoms of the cerebrospinal impairment,

and

superior

both

clinically

result from obfluid. Headache,

acute

illedema are due to intermittent men of Monro. When the tumors

intermittent

pap-

of the foralarge, persistent obstructive hydrocephalus develops Tumors considered in the differential diagnosis are: (1) colboid cyst, (2) meningioma, (3) ependymoma, and (4) choroid plexus

obstruction become .

papilloma.

Colboid

cysts

do

not

contain

calcium;

in the region the possibility

of

therefore,

cal-

the foramen of Monro of colboid cyst. Angio-

graphically, the internal cerebral vein, as seen in the lateral view, may be flattened and displaced downward in its posterior third due to dilated lateral ventricles. The anterior third of the internal cerebral vein may be elevated, curving concavely downward around the cyst [9]. In our case, the anterior third of the internal cerebral vein was slightly elevated but was not the typical humping described by others [9]. Although a faint choroid blush and the hypertrophied distal posterior choroidal arteries can be seen in the colloid cyst [10], it is probably more common in other third ventricle tumors, such as meningiomas (as in our case). A well defined oval or round mass of about 2.5 cm or less with a smooth ,

margin, and associated with tion of the lateral ventricle,

of

enhancement

calcifications

Calcification

with

pressure.

intracranial

in the

a marked

pattern

study

definite

1B).

A meningioma

neurofibromatosis. Plain skull films showed separation of the sutures and increased digital markings, indicative of increased intracranial No

mass

with

occasional psammoma bodies was verified histologically 3B). The postoperative course was essentially uneventful, cept for an episode of questionable seizure.

third

no definite

evidence

round

associated

Discussion

motor or sensation deficit. The Romberg test was normal, but the patient had poor heel walking. Superficial and deep tendon reflexes were unremarkable. Babinski’s sign was elicited on the right

(fig.

cium in tumors virtually excludes

intact.

circumscribed

of Monro

obstructive hydnocephalus (fig. 1A). A significant was noted after intravenous injection of contrast

(fig. 3A), firmly choroid plexus

Report

were

fonamen

with a faint tumor blush in the region of the foramen of Monro (fig. 2). A colboid cyst was diagnosed preoperatively. At night frontal craniotomy a tan-colored, 1 .5 cm solid mass

41/2

All the cranial

a 1 .5 cm well

of the lateral ventricles a slightly hypertrophied

M. G., a 10-year-old white boy, was in good health until months before admission when he began having occasional episodes of blurred vision with “black lines” after standing up quickly from a reclining position. One night in the month before admission, he was awakened by severe headache and abdominal pain, followed by nausea and vomiting. He was later awakened by severe stiffness and tenderness on the right side of the neck, and a private physician found bilateral papilledema without definite localizing signs. Later, he was transferred to Strong Memorial Hospital for further neurologic evaluation. Neurobogic examination revealed the patient was slightly ataxic.

Cyst in a Child

A. HORNER2

of the

degree of enhancement

[3], and Simpson [4], with a total of 1 241 cases, showed that only 3% of the meningiomas arose within ventricles. In 1942, Abbott and Courville [6] reviewed 50 reported intraventricular meningiomas and found only four were in patients 10 years old or younger. Of the 50 meningiomas, 28 were in the left lateral ventricle, 15 were in the right lateral ventricle, and only two originated in the third ventricle. In these two third-ventricle meningiomas, one occurred in a 36-year-old woman, while the other occurred in an 11-year-old girl. Of particular interest is that most of these were either fibrous, fibroblastic, or psammomatous meningiomas. In 1955, Heppner [7] reported two cases of third ventricle meningiomas in children, both located in the posteniorthird ventricle. Merten etal. [8] emphasized the increased frequency of calcification and higher mcidence of location in the posterior fossa and within the ventricles of meningiomas in children and adolescents, but meningiomas originating in the third ventricle were not mentioned. A case of third ventricle meningioma with radiographic features of colboid cyst in a 10-year-old boy is reported here. Case

FREDERICK

demonstrated

.5%

gioma

a Colloid

density

CT

[11-14].

CT will

slightly

demonstrate

greater

of the

moderate is always

than

lesion

to marked present on

a smooth brain

will

tissue.

be shown

mass

dilatathe air with

a

A significant

after

contrast

27, 1978. Center,

601

Elmwood

Avenue,

Rochester,

New

York

14642.

Address

reprint

requests

to

Lin.

Departments

AJR 132:669-671 © 1 979 American

of Pediatrics ,

AprIl 1979 Roentgen Ray

and Neurology.

University

of Rochester

Medical

669 Society

Center,

Rochester,

New York 14642. 0361

-803x/79/1324-0669

$0.00

670

CASE

REPORTS

AJR:132,

Fig.

1 -At

level

April

of

1979

foramen

of

Monro. A, Without contrast, mass with density slightly higher than normal brain

tissue.

B,

With

contrast

en-

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hancement, lesion is well circumscnibed 1.5 cm mass. C, At 1 cm higher, calcification in lateral ventnides associated with marked obstructive

hydrocephalus.

‘:‘ ‘

.‘

4

‘,



-:

C

1’

:‘

:‘.‘t

.

-.

4

Fig. medial

2.-Lateral posterior

view, choroidal

late arterial phase. artery with faint

Slightly hypertrophied tumor blush (arrows).

distal

-,.‘

V ‘

““

is given

in the air study colloid

[10,

and

11,

15,

16].

The

CT are virtually

combined

..;

findings

pathognomonic

\,.J

tumors

in

childhood,

Choroid very rare

from colloid cysts. Most are located in lateral ventricles and rarely in the third The surface of these tumors is bobulated and resembling cauliflower [5]. CT often shows ensolid masses with a small central lucency [17]. [5,

plexus 18].

papilbomas of They are usually

the roof

of the ventricle,

contrast

to the

these tumors ular frondlike enhancement be seen

in both

illoma. In our case, The calcification

well

the third attached

as are colloid

circumscribed

cysts.

colboid

ventricle superiorly

are to

However, cysts

[18,

in 19],

tend to be lobulated, and appear as irregintraventricular masses with significant on CT [17]. In addition, calcification may ependymomas

and

choroid

‘#{149} ,

-

,‘ -,

.

‘..,

-

,,t’ ...

distinguishable the fourth and tufted, hanced

,,

_

i.

:.#{149}‘

.

.,

.

1,

are ,‘:

ventricle.

.

-i,:;-

of a .,‘

common

I.

‘:‘.,::#{149}

.-

cyst.

Ependymomas,

d)P_

)

t”_

.

4

material

,z

,

plexus

pap-

CT findings most resembled a colloid cyst. of choroid plexus of the lateral ventri-

:

:

.

.‘

,.? ‘

..

.

.

‘q

L#{224}-

Fig. 3.-A, Solid mass. B. Meningioma of the meningothelial Psammoma body (arrow). (Low power magnification.)

pattern.

des was believed to be unrelated to the tumor. Such calcification is very unusual in a patient this age, and its etiology remains unclear. Thorough evaluation failed to reveal evidence of neurofibromatosis. At surgery, a well circumscribed

third

ventricle

mass

arising

was found

from

the

anterior

and a meningioma

roof

of the

was verified.

AJR:132,

April

CASE

1979

REFERENCES 1

.

Jefferson

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third

G, Jackson

ventricles.

H: Tumors

of the lateral

and of the

R Soc Med 32:1105-1137, 1939 2. Cushing H, Eisenhardt L: Meningiomas. Their Classification, Regional Behavior, Life History, and Surgical End Results. Springfield, Thomas, 1938 3. Olivecrona H: The panasagittal meningiomas. J Neurosurg 4:327-341, 1947 4. Simpson D: The recurrence of intracranial meningioma after surgical treatment. J Neurol Neurosurg Psychiatry 20:

22-39,

Proc

1957

5. Z#{252}lchKJ: Brain

York, Springer,

Tumors:

Their

Biology

and

Pathology.

New

1965

6. Abbott KH, Courvzlle CB: Intraventriculan meningiomas. Review of the literature and report of two cases. Bull Los Angeles Neurol Soc 7 : 12-28, 1942 7. Heppnen F: Meningiomas of the third ventricle in children.

Review of the literature uneventful recovery after BeIg

30:472-481,

1955

8. Merten DF, Gooding tunes of meningiomas diatrRadiol 2:89-96, 9. Batnitzky

5, Sarwar

B: Colboid 341, 1974 10.

Sackett

CA, Newton TH: The radiologic in childhood and adolescence. 1974 M, Leeds

cysts of the third

JF, Messina

and report of two cases with surgery. Acta Neurol Psychiatr

Pe-

NE, Schechter MM, Azar-Kia Radiology 1 1 2 : 327-

ventricle.

AV, Petito

fea-

CK: Computed

tomography

REPORTS

671

and magnification vertebral angiotomography in the diagnosis of colloid cysts of the third ventricle. Radiology 116: 95-100, 1975 1 1 . Lee KF, Lin SA: Neuroradiology of Sellar and Juxtasellar Mass Lesions. Springfield, Ill., Thomas, 1979 12. Little JK, MacCarty CS: Colloid cysts of the third ventricle. J Neurosurg 40 : 230-235 , 1974 13. Sage MR. McAllister VL, Kendall BE, Bull JWD, Moseley IF:

Radiology

in the diagnosis

of colloid

cysts

of the third

14.

ventricle. BrJ Radio! 48:708-723, 1975 Taveras JM , Wood EH : Diagnostic Neuroradiology Baltimore, Williams & Wilkins, 1976, pp 434-437

,

15.

Davis

tumors.

DO:

CT

in

the

diagnosis

of

supratentonial

2d ed.

Semin Roentgenol 12 :97-100, 1977 16. Osborn AG, Wing SD: Thin-section computed tomography in the evaluation of third ventricular colloid cyst. Radiology 124:257-258, 1977 17.

Naidich

TP,

Lin

JP,

Leeds

NE,

Pudlowski

Primary tumors and other masses fourth ventricle. Differential diagnosis raphy. Neuroradiology 14 : 153-174, 18. Rovit RL, Schechter MM, Chodnoff ilbomas: observation on radiographic 608-617, 1976 19. Thompson JA, Harwood-Nash DC, diology of childhood chonoid plexus 116-133, 1973

AM,

Naidich

JB:

of the cerebellum and by computed tomog1977 P: Choroid plexus papdiagnosis. AJR 110: Fitz CR: The neuronaneoplasms. AJR 118:

Third ventricle meningioma mimicking a colloid cyst in a child.

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