intradiploic epidermoid cyst

Intradiploic epidermoid cyst with osteolytic lesions of the skull.. Computed tomography scan with bone density window reveal an occipital osteolytic lesion (arrows).

Intradiploic

epidermoid cyst with osteolytic lesions of the skull.. Computed tomography scan with bone density window reveal an occipital osteolytic lesion (arrows).

www.eurorad.org • CC by-nc-sa-4.0

Intradiploic epidermoid cyst • Skull vault epidermoid - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Skull vault epidermoid - Ganzer Fall bei Radiopaedia

O'Donnell C, Skull vault epidermoid. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-30621 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Guan H, Intradiploic epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-149471 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Large intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Large intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Haouimi A, Large intradiploic epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-84138 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Alghamdi K, Intradiploic epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-78160 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Orbital intradiploic epidermoid cyst causing proptosis - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Orbital intradiploic epidermoid cyst causing proptosis - Ganzer Fall bei Radiopaedia

Hidayatov A, Orbital intradiploic epidermoid cyst causing proptosis. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-54524 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Angular epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Angular epidermoid cyst - Ganzer Fall bei Radiopaedia

Gaillard F, Angular epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-46908 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Ibrahim D, Intradiploic epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-42382 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst • Intradiploic epidermoid - skull - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid - skull - Ganzer Fall bei Radiopaedia

Gaillard F, Intradiploic epidermoid - skull. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-10972 • CC by-nc-sa 3.0 (modified)

Intradiploic epidermoid cyst with osteolytic lesions of the skull.. Axial T2-weighted images demonstrate an inhomogeneous hyperintense lesion in the right occipital intradiploic space (arrows).

Intradiploic

epidermoid cyst with osteolytic lesions of the skull.. Axial T2-weighted images demonstrate an inhomogeneous hyperintense lesion in the right occipital intradiploic space (arrows).

www.eurorad.org • CC by-nc-sa-4.0

Intradiploic epidermoid cyst • Intradiploic epidermoid - skull - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid - skull - Ganzer Fall bei Radiopaedia

Gaillard F, Intradiploic epidermoid - skull. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-10972 • CC by-nc-sa 3.0 (modified)

Spectrum of lytic lesions of the skull: a pictorial essay. IEC. On MR images of the same patient shown in Fig. 3, the lesion appears slightly inhomogeneous, mostly hyperintense on T2w (a) and hypointense on T1w (b) images, without contrast enhancement (c), showing diffusion restriction on b 1000 diffusion-weighted imaging (DWI) and the apparent diffusion coefficient (ADC) map (d, e). It causes compression on the confluence of sinuses (sagittal contrast-enhanced T1w image, f). As a consequence, the patient presented with intracranial hypertension symptoms

Spectrum of

lytic lesions of the skull: a pictorial essay. IEC. On MR images of the same patient shown in Fig. 3, the lesion appears slightly inhomogeneous, mostly hyperintense on T2w (a) and hypointense on T1w (b) images, without contrast enhancement (c), showing diffusion restriction on b 1000 diffusion-weighted imaging (DWI) and the apparent diffusion coefficient (ADC) map (d, e). It causes compression on the confluence of sinuses (sagittal contrast-enhanced T1w image, f). As a consequence, the patient presented with intracranial hypertension symptoms

insightsimaging.springeropen.com • CC-by-4.0

Spectrum of lytic lesions of the skull: a pictorial essay. Intradiploic epidermoid cyst (IEC). Axial CT images with soft tissues (a) and bone (b) windows show an occipital hypodense osteolytic lesion with smooth margins and greater involvement of the inner table, extensively demineralised

Spectrum of

lytic lesions of the skull: a pictorial essay. Intradiploic epidermoid cyst (IEC). Axial CT images with soft tissues (a) and bone (b) windows show an occipital hypodense osteolytic lesion with smooth margins and greater involvement of the inner table, extensively demineralised

insightsimaging.springeropen.com • CC-by-4.0

Radiological review of skull lesions. Epidermoid cyst. Axial head CT portrays an expansile lesion in the right frontal bone (thick arrow) with thinning of the inner and outer tables (dashed arrows). Axial T1-weighted imaging (b), axial T2-weighted imaging (c), axial DWI (d) and axial post contrast T1-weighted imaging (e) show that the lesion is hypointense on T1, hyperintense on T2 with restricted diffusion and absent internal enhancement (arrowheads). Note that there may be some enhancement along the peripheral margins

Radiological

review of skull lesions. Epidermoid cyst. Axial head CT portrays an expansile lesion in the right frontal bone (thick arrow) with thinning of the inner and outer tables (dashed arrows). Axial T1-weighted imaging (b), axial T2-weighted imaging (c), axial DWI (d) and axial post contrast T1-weighted imaging (e) show that the lesion is hypointense on T1, hyperintense on T2 with restricted diffusion and absent internal enhancement (arrowheads). Note that there may be some enhancement along the peripheral margins

insightsimaging.springeropen.com • Open Access

Intradiploic epidermoid cyst with osteolytic lesions of the skull.. Axial post gadolinium T1-weighted MR images show minimal and peripheral contrast enhancement (arrows).

Intradiploic

epidermoid cyst with osteolytic lesions of the skull.. Axial post gadolinium T1-weighted MR images show minimal and peripheral contrast enhancement (arrows).

www.eurorad.org • CC by-nc-sa-4.0

Intradiploic epidermoid cyst with osteolytic lesions of the skull.. Axial FLAIR images demonstrate an inhomogeneous hyperintense lesion in the right occipital intradiploic space (arrows).

Intradiploic

epidermoid cyst with osteolytic lesions of the skull.. Axial FLAIR images demonstrate an inhomogeneous hyperintense lesion in the right occipital intradiploic space (arrows).

www.eurorad.org • CC by-nc-sa-4.0

Intradiploic epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Intradiploic

epidermoid cyst • Intradiploic epidermoid cyst - Ganzer Fall bei Radiopaedia

Geetha Virupakshappa A, Intradiploic epidermoid cyst. Case study, Radiopaedia.org (Accessed on 20 Dec 2023) https://doi.org/10.53347/rID-179771 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

siehe auch

Osteolysen der Kalotte
intrakranielle Epidermoidzyste
epidermale Inklusionszyste

Intradiploic epidermoid cysts represent epidermoid cysts that occur in the diploë of the skull.

Clinical presentation

Painless slowly progressive scalp swelling.

Pathology

epidermoid cysts may be congenital (most common, arising from ectodermal inclusion during neural tube closure and subsequently remain within the cranial bones) or acquired (e.g. post-surgical or post-traumatic implantation)
intradiploic epidermoids are less frequent than the intradural variety

Radiographic features

Intradiploic epidermoids occurs within the frontal, parietal, occipital and sphenoid bones, as well as the spine .

Plain radiograph

rounded or lobulated area of bone destruction, well-delineated sclerotic scalloped margins

CT

non-enhancing hypodense lesion with sharply demarcated bony defects and zones of calcifications
it may alter the outer and/or inner tables of the skull (the inner table more than the outer)