We report the case of a 7-year-old boy with an incidentally diagnosed left sylvian arachnoid cyst. At a clinical follow-up of 2 years, cranial computed tomography scans found the cyst to be totally resolved. The mechanism of this rare spontaneous resolution of an arachnoid cyst is discussed.

Keywords:
Arachnoid cyst, Spontaneous resolution
1.
Pandey P, Tripathi M, Chandra PS, Singh VP, Mehta VS: Spontaneous decompression of a posterior fossa arachnoid cyst: a case report. Pediatr Neurosurg 2001;35:162-163.
2.
Russo N, Domenicucci M, Beccaglia MR, Santoro A: Spontaneous reduction of intracranial arachnoid cysts: a complete review. Br J Neurosurg 2008;22:626-629.
3.
Przybylo HJ, Radkowski MA, Przybylo J, McLone D: Spontaneous resolution of an asymptomatic arachnoid cyst. Pediatr Neurosurg 1997;26:312-314.
4.
Weber R, Voit T, Lumenta C, Lenard HG: Spontaneous regression of a temporal arachnoid cyst. Childs Nerv Syst 1991;7:414-415.
5.
Bright R: Serous cysts in arachnoid; in Reports of Medical Cases Selected with a View of Illustrating the Symptoms and Cure of Diseases by a Reference to Morbid Anatomy. Part I. Diseases of the Brain and Nervous System. London, Richard Taylor, 1831, vol II, pp 437-449.
6.
Aicardi J, Bauman F: Supratentorial extracerebral cysts in infants and children. J Neurol Neurosurg Psychiatry 1975;38:57-68.
7.
Robinson RG: Congenital cysts of the brain: arachnoid malformation. Prog Neurol Surg 1971;9:133-174.
8.
Seizeur R, Forlodou P, Coustans M, Dam-Hieu P: Spontaneous resolution of arachnoid cysts: review and features of an unusual case. Acta Neurochir (Wien). 2007;149:75-78.
9.
Mori T, Fujimoto M, Sakae K, Sakakibara T, Shin H, Yamaki T, Ueda S: Disappearance of arachnoid cysts after head injury. Neurosurgery 1995;36:938-942.
10.
Galassi E, Tognetti F, Gaist G, Fagioli L, Frank F, Frank G: CT scan and metrizamide CT cisternography in arachnoid cysts of the middle cranial fossa: classification and pathophysiological aspects. Surg Neurol 1982;17:363-369.
11.
Go KG, Houthoff HJ, Blaauw EH, Havinga P, Hartsuiker J: Arachnoid cysts of the sylvian fissure. Evidence of fluid secretion. J Neurosurg 1984;60:803-813.
12.
Locatelli D, Bonfanti N, Sfogliarini R, Gajno TM, Pezzotta S: Arachnoid cysts: diagnosis and treatment. Childs Nerv Syst 1987;3:121-124.
13.
Sato K, Shimoji T, Yaguchi K, Sumie H, Kuru Y, Ishii S: Middle fossa arachnoid cyst: clinical, neuroradiological, and surgical features. Childs Brain 1983;10:301-316.
14.
Beltramello A, Mazza C: Spontaneous disappearance of a large middle fossa arachnoid cyst. Surg Neurol 1985;24:181-183.
15.
Yamanouchi Y, Someda K, Oka N: Spontaneous disappearance of middle fossa arachnoid cyst after head injury. Childs Nerv Syst 1986;2:40-43.
16.
Inoue T, Matsushima T, Tashima S, Fukui M, Hasuo K: Spontaneous disappearance of a middle fossa arachnoid cyst associated with subdural hematoma. Surg Neurol 1987;28:447-450.
17.
Yoshioka H, Kurisu K, Arita K, Eguchi K, Tominaga A, Mizoguchi N, Tajima T: Spontaneous disappearance of a middle cranial fossa arachnoid cyst after suppurative meningitis. Surg Neurol 1998;50:487-491.
18.
Wester K, Gilhus NE, Hugdahl K, Larsen JL. Spontaneous disappearance of an arachnoid cyst in the middle intracranial fossa. Neurology 1991;41:1524-1526.
19.
Mokri B, Houser OW, Dinapoli RP: Spontaneous resolution of arachnoid cysts. J Neuroimaging 1994;4:165-168.
20.
Rakier A, Feinsod M: Gradual resolution of an arachnoid cyst after spontaneous rupture into the subdural space. Case Rep 1995;83:1085-1086.
21.
McDonald PJ, Rutka JT: Middle cranial fossa arachnoid cysts that come and go. Report of two cases and review of the literature. Pediatr Neurosurg 1997;26:48-52.
22.
Yamauchi T, Saeki N, Yamaura A: Spontaneous disappearance of temporo-frontal arachnoid cyst in a child. Acta Neurochir (Wien) 1999;141:537-540.
23.
Dodd RL, Barnes PD, Huhn SL: Spontaneous resolution of a prepontine arachnoid cyst. Case report and review of the literature. Pediatr Neurosurg 2002;37:152-157.
24.
Liu Z, Li J, Xu J: Teaching neuroimages: spontaneous resolution of a giant intracranial arachnoid cyst. Neurology 2016;86:199-200.
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2017
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