Extradural Dermoid Cyst of the Anterior Infratemporal Fossa. Case Report

Watanabe, Kentaro; Filomena, Carol A.; Nonaka, Yoichi; Matsuda, Masahide; Zomorodi, Ali R.; Friedman, Allan H.; Fukushima, Takanori

doi:10.1055/s-0034-1544111

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…The embryologic origins of dermoid cysts have been controversial due to the unknown mechanism of formation of such dysraphisms. Dermoid cysts are made up of both ectodermal and mesodermal elements and form either as a result of incomplete closure of the neural tube during the third to fifth week of fetal development or due to traumatic implantation of skin elements [ 13 , 15 , 19 ].…”

Section: Discussionmentioning

confidence: 99%

“…Location of head and neck dermoid cysts, both extradural and intradural, has been mainly reported in the fontanels, petrous apex, Eustachian tube, periorbital or perinasal soft tissue, cavernous sinus, anterior cranial fossa, or in the skull suture located near the skin where they connect directly to a dermal sinus [5,6,13,14]. Head and neck dermoid cysts rarely originate from the skull base, the infratemporal region, supratentorial, or the fourth ventricle [15][16][17][18].…”

Section: Discussionmentioning

confidence: 99%

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An Intracranial Extradural Dermoid Cyst Presenting with Two Dermal Sinuses and an Abscess in a Child

Albastaki

AlThawadi

Alajaimi

et al. 2021

Case Reports in Neurological Medicine

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Dermoid cysts account for only a small fraction of intracranial masses, with extradural dermoid cysts being considered a much rarer entity than those located intradurally. Intracranial dermoid cysts vary in clinical presentations: some maybe asymptomatic whilst others harbor features of raised intracranial pressure, neurological deficits, or even aseptic meningitis. Dermoid cysts may also present with cutaneous lesions. Herein, we report a rare case of a 1-year-old female presenting with a midline, scalp abscess. Brain MRI revealed an intracranial, extradural tumor, with features suggestive of a dermoid cyst, unusually located in the crista galli, and complicated by the formation of two cutaneous sinus tracts. After identification and characterization by MRI, bitemporal craniotomy was performed with complete excision of the mass and sinus tracts. Histological analysis confirmed dermoid cyst as the final diagnosis. Postoperatively, the patient recovered fully and had no evidence of recurrence in subsequent visits. The case mentioned above highlights the rarity of such a presentation for an intracranial extradural dermoid cyst and the vitality of early imaging for midline cutaneous lesions for identification of intracranial extensions and avoidance of detrimental consequences.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

An Intracranial Extradural Dermoid Cyst Presenting with Two Dermal Sinuses and an Abscess in a Child

Albastaki

AlThawadi

Alajaimi

et al. 2021

Case Reports in Neurological Medicine

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“…В большинстве случаев ДК в течение длительного периода времени протекают бессимптомно [3]. Обычно экстрадуральная ДК представляет собой подапоневротическую структуру, покрытую неповрежденной кожей.…”

Section: рис 3 интраоперационные фотографии: а -вид дермоидной кисты; б -вскрытие капсулы кисты; в -содержимое кисты; г -выраженное истонunclassified

“…МРТ-исследование является более информативным методом. Жировое содержимое, волосяные фолликулы и десквамированный эпителий ДК дают неоднородный гипоинтенсивный сигнал на Т1-взвешенных изображениях и неоднородный гиперинтенсивный сигнал на Т2-взвешенных изображениях [3,7].…”

iant extradural dermoid cyst in the right parietal-occipital region with obliteration of the transverse sinus

Belozerskikh

Evzikov

2021

Opuholi golovy i šei

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The study objective – to report a case of giant extradural dermoid cyst in a 48‑year-old woman; the cyst caused extensive erosion of the occipital bone and lower portions of the right parietal bone, which is quite rare.Case report. A 48‑year-old female patient was admitted to the Department of Neurosurgery, A. Ya. Kozhevnikov Clinic of Nervous System Diseases, University Clinical Hospital No. 3, I. M . Sechenov First Moscow State Medical University on 28.07.2020. In 2002, the patient noted the emergence of a 1‑cm subcutaneous formation in the right occipital region. The formation was slowly growing. On 17.12.2015, she underwent magnetic resonance imaging of the brain. It revealed a 2,5 × 4,4 × 4,0 cm extradural formation with clear contours and erosion of the occipital and right parietal bones. On 12.03.2020, she had contrast-enhanced magnetic resonance imaging, which demonstrated that the tumor was growing (its size was 3,0 × 6,4 × 5,5 cm). Magnetic resonance imaging scans also showed extensive erosion (6,4 × 5,4 cm) of the occipital and right parietal bones and obliteration of the right transverse sinus. On 28.07.2020, the patient underwent elective surgery, namely excision of the extradural dermoid cyst in the right parietooccipital region with simultaneous reconstruction of the calvarial bones using a titanium plate. The cyst capsule and its contents were completely removed. The capsule was tightly attached to the dura mater, but did not invade it. To remove small fragments of the capsule that could potentially invade the bone, we performed small marginal resection of the calvarial bones at the depth of 2–3 mm from the defect margin. After the removal of cyst capsule, well-defined furrow could be visualized on the dura mater in the projection of the obliterated transverse sinus. Five days postoperatively, the patient was discharged from hospital in satisfactory condition.Conclusion. Surgical treatment of extradural dermoid cysts implies radical removal of the tumor. Since the cyst capsule gets tightly attached to the edges of the bone defect along with bone erosion, the removal of such cysts as a single block is almost impossible. The risk of severe erosion of the skull bones caused by a dermoid cyst with extradural (and sometimes intradural) growth increases with age. Therefore, it is recommended to remove such tumors as early as possible. Patients with skull bone defects also require cranioplasty.

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“…1 They are considered to arise due to ectopic inclusion of epithelial cells in the course of neural tube closure between the third and fifth week of embryonic development. [1][2][3] Most intracranial dermoid cysts occur in intradural midline locations, such as the posterior fossa, suprasellar region, and parasellar region. 4 Extradural dermoid cysts are regarded as a much rarer lesion, for which there are only 15 case reports in the literature to date.…”

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confidence: 99%

Frontotemporal giant extradural dermoid cyst: illustrative case

Cao¹,

Xu²,

Hu³

et al. 2023

Journal of Neurosurgery: Case Lessons

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BACKGROUND Dermoid cyst is a rare benign tumor exhibiting a typical radiological pattern and most commonly located along the midline. Laboratory examination was always normal. However, the features of some rare cases are atypical that can be easily misdiagnosed as other tumors. OBSERVATIONS A 58-year-old patient presented with tinnitus, dizziness, blurred vision, and gait unsteadiness. Laboratory examination showed the serum levels of carbohydrate antigen 19-9 (CA19-9) were significantly increased (186 U/mL). A computed tomography (CT) scan revealed a predominant hypodense lesion in the left frontotemporal region with a hyperdense mural nodule. The lesion appeared as an intracranial extradural mass with a mural nodule on the sagittal image, displaying mixed signal on T1- and T2-weighted imaging. A left frontotemporal craniotomy was performed for cyst resection. Histological results confirmed a diagnosis of dermoid cyst. No tumor recurrences were observed at the 9-month follow-up. LESSONS Extradural dermoid cyst with a mural nodule is extremely rare. When a hypodense lesion on CT shows mixed signal on T1- and T2-weighted imaging with a mural nodule, even if it is located in the extradural areas, it is important to consider a dermoid cyst. Serum CA19-9 combined with atypical imaging features may contribute to the diagnosis of dermoid cysts. Only recognition of atypical radiological features can avoid misdiagnosis.

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Extradural Dermoid Cyst of the Anterior Infratemporal Fossa. Case Report

Cited by 7 publications

References 18 publications

An Intracranial Extradural Dermoid Cyst Presenting with Two Dermal Sinuses and an Abscess in a Child

An Intracranial Extradural Dermoid Cyst Presenting with Two Dermal Sinuses and an Abscess in a Child

iant extradural dermoid cyst in the right parietal-occipital region with obliteration of the transverse sinus

Frontotemporal giant extradural dermoid cyst: illustrative case

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