Intra-axial dermoid tumor mimicking pilocytic astrocytoma

Masri, Amira; Bakri, Faris G.; Assaf, Abeer; Musharbash, Awni; Haroun, Azmi A.; Zak, Imad

doi:10.1007/s00381-008-0796-0

Cited by 4 publications

(2 citation statements)

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“…Dermoid cysts typically exhibit no contrast enhancement, although sporadic case reports have featured dermoid cysts that enhance after the administration of gadolinium. 15,17 In our case, the lesion demonstrated decreased signal on T1-weighted sequences and increased signal on T2-weighted sequences. A heterogeneous signal within the lesion was observed on all sequences.…”

Section: Imaging Characteristicsmentioning

confidence: 50%

Analysis of the growth pattern of a dermoid cyst

Fanous

Gupta

2014

PED

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Dermoid cysts are rare lesions of the CNS with a slow rate of growth. For this reason, they are rarely discovered during infancy. Although benign, these cysts may be associated with devastating complications due to mass effect or meningitis. The discovery of completely asymptomatic dermoid cysts in the pediatric population is exceedingly rare; however, correct and prompt diagnosis is crucial for early surgical treatment to minimize morbidity and mortality. The authors report the unique case of a posterior fossa dermoid cyst discovered in a 5-month-old girl and monitored for 2.5 years with serial imaging studies before performing a resection. The imaging characteristics of dermoid cysts are reviewed, and the challenges associated with the radiographic diagnosis of such lesions are discussed. Analyzing the growth of this particular cyst on MRI allowed comment, for the first time to the authors' knowledge, regarding the growth rate of dermoid cysts. Unlike true tumors, which grow in an exponential pattern, the dermoid cyst in the reported case exhibited a linear growth pattern. The increase in volume followed the classic appearance of a cuboid sequence, which is also consistent with linear growth in all 3 dimensions.

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Section: Imaging Characteristicsmentioning

confidence: 50%

Analysis of the growth pattern of a dermoid cyst

Fanous

Gupta

2014

PED

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“…To date, only 8 cases of intraaxial dermoid cysts have been reported in the literature, with 2 of these lesions being found in the brainstem. 3,8,9,14,16,20,22,23 We report the first case of an intraaxial dermoid cyst located in the medulla and review the literature of the existing intraparenchymal cases.…”

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confidence: 99%

Intraaxial dermoid cyst of the medulla

Park

Babu²,

Kranz

et al. 2013

JNS

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Intracranial dermoid cysts are rare congenital lesions that typically occur in the cisternal spaces. However, exceptionally rare cases of intraaxial involvement have been reported, with only 8 cases having been described in the literature. The authors report the first case of an intraaxial dermoid cyst located in the medulla and the first occurrence in an elderly patient. They also review the literature of the existing intraparenchymal cases and provide treatment guidelines. A 66-year-old man presented with slowly progressive dysphagia, left lower-extremity numbness, nausea, and hyperhidrosis. Neurological examination revealed decreased pinprick sensation of the left side of his face and body, and decreased vibratory sensation in his left lower extremity. Additionally, he had an unusual extraocular movement in which abduction of the eye resulted in closure of the contralateral eye. Magnetic resonance imaging revealed a nonenhancing cystic lesion centered in the medulla. The patient underwent a suboccipital craniotomy with laminectomy of C1-2 for excision of the cyst, with subtotal resection due to adherence of the cyst wall to the brainstem. At follow-up 7.5 years after surgery, the patient's neurological examination was stable. Magnetic resonance imaging did not reveal any progression or recurrence of the cyst. As the cyst wall is typically adherent to surrounding structures, resection is usually subtotal due to the risk of neurological deficits. As there have been no cases of progression after subtotal resection, gross-total resection is not warranted for the treatment of these lesions.

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