Spontaneous Regression of Radiologically Diagnosed Epidermoid Cyst Originating from the Cerebellopontine Angle.
Epidermoid cyst
Follow-up
Malignant transformation
Regression
Journal
World neurosurgery
ISSN: 1878-8769
Titre abrégé: World Neurosurg
Pays: United States
ID NLM: 101528275
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
received:
16
07
2020
revised:
01
09
2020
accepted:
02
09
2020
pubmed:
25
9
2020
medline:
18
5
2021
entrez:
24
9
2020
Statut:
ppublish
Résumé
Generally, asymptomatic epidermoid cysts (ECs) or ECs with minor symptoms controlled by medication are not treated further. Although epidermoid carcinomas are only sporadically reported, the possibility of malignant transformation of ECs is of concern. A 77-year-old man under observation for a left cerebellopontine angle tumor presented with no symptoms, including headache, dizziness, or other cranial nerve abnormalities typical of cerebellopontine angle tumors. The tumor manifested as an extra-axial mass in the left cerebellopontine angle and measured 24 × 16 mm (length × width) on magnetic resonance imaging (MRI). As he was asymptomatic, his primary physician did not pursue invasive treatment but ordered follow-up MRI every 2 years. The tumor decreased in size 2 years after the initial MRI, and no tumor fragmentation was observed on the patient's spinal MRI. Ultimately, the tumor shrank to 19 × 11 mm over 22 years. The reduction of an EC is extremely rare. We report a case of spontaneous regression of an EC and consider similar previous cases.
Sections du résumé
BACKGROUND
Generally, asymptomatic epidermoid cysts (ECs) or ECs with minor symptoms controlled by medication are not treated further. Although epidermoid carcinomas are only sporadically reported, the possibility of malignant transformation of ECs is of concern.
CASE DESCRIPTION
A 77-year-old man under observation for a left cerebellopontine angle tumor presented with no symptoms, including headache, dizziness, or other cranial nerve abnormalities typical of cerebellopontine angle tumors. The tumor manifested as an extra-axial mass in the left cerebellopontine angle and measured 24 × 16 mm (length × width) on magnetic resonance imaging (MRI). As he was asymptomatic, his primary physician did not pursue invasive treatment but ordered follow-up MRI every 2 years. The tumor decreased in size 2 years after the initial MRI, and no tumor fragmentation was observed on the patient's spinal MRI. Ultimately, the tumor shrank to 19 × 11 mm over 22 years.
CONCLUSIONS
The reduction of an EC is extremely rare. We report a case of spontaneous regression of an EC and consider similar previous cases.
Identifiants
pubmed: 32971281
pii: S1878-8750(20)32016-7
doi: 10.1016/j.wneu.2020.09.008
pii:
doi:
Types de publication
Case Reports
Langues
eng
Sous-ensembles de citation
IM
Pagination
238-243Informations de copyright
Copyright © 2020 Elsevier Inc. All rights reserved.