CT and MRI features of scalp lesions

Kawaguchi, Masaya; Kato, Hiroki

doi:10.1007/s11547-019-01060-6

Cited by 18 publications

(21 citation statements)

References 40 publications

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“…Cases of cAS predominantly involve the scalp and face in elderly individuals, with a male predilection. 5 , 15 In keeping with previous reports, the mean age of patients with cAS in this study was 80 years old, and three-quarters of patients were male.…”

Section: Discussionsupporting

confidence: 89%

“…Signal intensities of malignant melanoma and cAS are sometimes similar; however, malignant melanoma usually has a smaller tumor size than that of cAS. 15 Although neurofibromatosis and metastasis often exhibit multiple lesions like cAS, 15 intratumoral hypointensity on T2-weighted images may contribute to cAS diagnosis.…”

Section: Discussionmentioning

confidence: 99%

“…11 Some previous studies have evaluated magnetic resonance (MR) imaging findings in cAS of the scalp 12 and angiosarcoma of the breast 13 , 14 with emphasis on their hypervascularity on contrast-enhanced MR images. However, because radiologists encounter cASs during the radiological interpretation for brain MR images in daily medical practice, 15 knowledge of unenhanced MR imaging findings is essential for the diagnosis of cAS of the scalp. On the other hand, some previous studies have evaluated MR imaging findings in cSCC of the head and neck 16 and 18 F-fluorodeoxyglucose ( 18 F-FDG)–positron emission tomography (PET)/computed tomography (CT) imaging findings in cAS 17 and cSCC.…”

Section: Introductionmentioning

confidence: 99%

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Imaging findings of cutaneous angiosarcoma of the scalp: Comparison with cutaneous squamous cell carcinoma

et al. 2021

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Purpose This study aimed to evaluate imaging findings of cutaneous angiosarcoma (cAS) of the scalp compared with those of cutaneous squamous cell carcinoma (cSCC). Methods This study included 15 patients with primary cAS and 10 with primary cSCC of the scalp. Seven patients with cAS and eight with cSCC underwent magnetic resonance imaging, and 11 patients with cAS and eight with cSCC underwent 18F-fluorodeoxyglucose–positron emission tomography/computed tomography imaging. Imaging findings for both pathologies were retrospectively reviewed and compared. Results All 15 cAS cases were elevated lesions with an obtuse angle, invading the subcutaneous fat tissue. Multiple lesions were observed in only five cAS cases (33%) and no cSCC cases. Maximum diameter-to-height ratio was significantly higher in cAS than in cSCC (3.3 ± 1.0 versus 2.3 ± 0.6; p < 0.01). On T2-weighted images, intratumoral hypointensity (86% versus 13%; p < 0.01) and mixed hyper- and hypointensity (71% versus 0%; p < 0.01) were observed more frequently in cAS than in cSCC. No significant differences were observed between cAS and cSCC regarding flow void (29% versus 25%; p = 0.656). Maximum standardized uptake values were marginally significantly lower in cAS than in cSCC (5.6 ± 3.1 versus 10.5 ± 6.6; p = 0.078). Conclusions Cases of cAS of the scalp always exhibited flat elevated lesions with invasion of the subcutaneous fat tissue. Compared with cSCC, intratumoral hypointensity and mixed hyper- and hypointensity on T2-weighted images were more frequent in cAS. These findings will help with the differential diagnosis of cAS.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Imaging findings of cutaneous angiosarcoma of the scalp: Comparison with cutaneous squamous cell carcinoma

et al. 2021

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“…Subgaleal hematomas form within the potential space between the periosteum and the galea aponeurosis 6 . The galea aponeurosis, also termed the epicranial aponeurosis, is a thin tendinous sheath beneath the skin and subcutaneous tissue 7 . These hematomas can be differentiated from cephalohematomas because they are not limited by the calvarial sutures and, unlike cephalohematomas, have not been reported to ossify in infants 6 .…”

Section: Introductionmentioning

confidence: 99%

“…6 The galea aponeurosis, also termed the epicranial aponeurosis, is a thin tendinous sheath beneath the skin and subcutaneous tissue. 7 These hematomas can be differentiated from cephalohematomas because they are not limited by the calvarial sutures and, unlike cephalohematomas, have not been reported to ossify in infants. 6 They are caused by rupture of the emissary veins that connect the dural sinuses and scalp veins, which leads to accumulation of blood.…”

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Canine calvarial subperiosteal hematomas are fluid to soft tissue attenuating mass‐like lesions with smoothly marginated peripheral mineralization on CT

Nowak

King

Ansón

2020

Vet Radiology Ultrasound

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Subperiosteal hematomas are accumulations of blood between a bone and the periosteum leading to elevation of the periosteum. When ossified they have a mineralized outer rim. For this retrospective, multi-institutional case series, medical records were searched to identify dogs that underwent CT for focal calvarial swellings noted acutely after trauma. A total of four dogs were included. Computed tomography images were reviewed for each case. The focal swellings had progressed in size during the weeks after the head trauma until the time of imaging. Findings in all cases included a fluid to soft tissue attenuating mass-like lesion with smoothly marginated peripheral mineralization. Diagnosis was confirmed in two cases by cytology and/or histopathology. Therefore, authors recommend that subperiosteal hematoma be included in the differential diagnosis list for dogs with these clinical and CT characteristics. Based on our review of the literature, this is the first report to describe the CT features of calvarial subperiosteal hematomas in dogs.

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Other Imaging Techniques for Skin

Zhu

Guo

et al. 2022

Diagnostic Ultrasound in Dermatology

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CT and MRI features of scalp lesions

Cited by 18 publications

References 40 publications

Imaging findings of cutaneous angiosarcoma of the scalp: Comparison with cutaneous squamous cell carcinoma

Imaging findings of cutaneous angiosarcoma of the scalp: Comparison with cutaneous squamous cell carcinoma

Canine calvarial subperiosteal hematomas are fluid to soft tissue attenuating mass‐like lesions with smoothly marginated peripheral mineralization on CT

Other Imaging Techniques for Skin

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