High Resolution Ultrasound Imaging of Melanocytic and Other Pigmented Lesions of the Skin

Machet, L.; Samimi, Mahtab; Georgesco, Gabriella; Mourtada, Youssef; Naouri, M.; Grégoire, Jean‐Marc; Ossant, F.; Patat, F.; Vaillant, L.

doi:10.5772/15372

Cited by 11 publications

(13 citation statements)

References 31 publications

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“…This is coupled with literature describing the differential appearance on ultrasound images of various skin lesions, chief among them melanoma, basal cell carcinoma (BCC), and benign nevi. Melanoma is generally described as being the most hypoechoic, with-well defined borders, a thin echo entry, and a spindle-like shape [6][7][8][9]. In contrast, BCC lesions are less hypoechoic, often feature many hyperechoic spots, and their contours are generally more irregular, while nevi are moderately hyperechoic, well demarcated from the dermis, and oval-to-circular in shape [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Melanoma is generally described as being the most hypoechoic, with-well defined borders, a thin echo entry, and a spindle-like shape [6][7][8][9]. In contrast, BCC lesions are less hypoechoic, often feature many hyperechoic spots, and their contours are generally more irregular, while nevi are moderately hyperechoic, well demarcated from the dermis, and oval-to-circular in shape [6][7][8][9][10]. According to one of the coauthors K. Szalai (a radiologist with extensive experience in the ultrasound examination of skin lesions), the qualitative features of these lesions are as summarized in Table 1 As a means of comparing the ultrasound features quoted in the literature as well as those given in Table 1, Fig.…”

Section: Introductionmentioning

confidence: 99%

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Automated classification of common skin lesions using bioinspired features

Csabai

Szalai

Gyöngy

2016

2016 IEEE International Ultrasonics Symposium (IUS)

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Abstract-Ultrasound (US) imaging of skin lesions provides information supplementary to dermoscopy and helps in improving diagnostic accuracy. The aim of the current work is to explore the feasibility of using ultrasound image features derived from radiological experience to distinguish between common skin lesions. 5-18 MHz B-mode ultrasound images were acquired of incoming patients. Images containing lesions 1-2 mm thick were selected (N=248), with histology used to diagnose suspicious lesions. 73 melanomas, 130 BCC, and 45 nevi were studied. Following semi-automatic segmentation, a number of relevant features expressing the geometry of the lesion boundary and boundary layer, as well as the image characteristics of the lesion, lesion boundary layer, and post-lesion region were considered. With the exception of lesion echogenicity, all features had an area under the curve (AUC) value of above 0.70. The AdaBoost and Support Vector Machine (SVM) classifiers were then trained and tested using cross-validation of 50 random equal populations of melanomas, BCC, and nevi; each population was then 2-fold (holdout) cross-validated 50 times. When detecting one group against two other groups, the detection of cancerous lesions fared best, with an AUC of at least 0.84 and a specificity of at least 19% at 100% sensitivity for both classifiers. The results demonstrate the potential of clinically useful ultrasound-based automatic differential diagnosis of skin lesions, which could perhaps be attained by better segmentation, having more training data, using several images of the same lesion when performing classification, as well as refinements in the definition of image features.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Automated classification of common skin lesions using bioinspired features

Csabai

Szalai

Gyöngy

2016

2016 IEEE International Ultrasonics Symposium (IUS)

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“…The results of previous studies carried out by the cited authors agree with the results of our study and prove that pre-operative evaluation of melanoma thickness is possible using either a 20 or 50 MHz probe. Moreover, the HFUS examination is standard in pre-operative evaluation of melanoma in Germany and France, especially in determination of resection margins [12,18,19].…”

Section: Discussionmentioning

confidence: 99%

“…Thickness of the melanoma along with the number of mitoses and presence or absence of ulceration shows the greatest correlation with the degree of 5-year survival [2]. So far, individual studies have addressed the issue of pre-operative melanoma evaluation using ultrasonography, high-frequency ultrasonography (HFUS) and optical coherence tomography (OCT) [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the clinical usefulness of high-frequency ultrasonography in pre-operative evaluation of cutaneous melanoma – a prospective study

Piłat¹,

Borzęcki²,

Jazienicki³

et al. 2020

pdia

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Introduction: There are many papers in the available literature on the pre-operative evaluation of malignant melanoma (MM) using a 20 MHz probe. In many Western European countries, this examination is standard in the diagnosis of such lesions in terms of the resection margin. However, few papers describe and compare the results of melanoma thickness measurements using 20 and 50 MHz frequency probes. Aim: The aim of the study was to evaluate the thickness of melanoma using 20 and 50 MHz probes. In addition, the obtained values were evaluated in comparison to the thickness values obtained in the histopathological examination. Material and methods: Melanoma malignum was confirmed histopathologically in 19 out of 72 patients. Then only those 19 patients were enrolled in the study. Results: A correlation was demonstrated between the thickness of the melanoma measured with the 20 and 50 MHz probes, expressed in mm, and the thickness obtained in the histopathological examination expressed in millimeters (Breslow's scale). It was 0.759 (p < 0.001) and 0.734 (p < 0.001), respectively. The average thickness of melanomas obtained in ultrasound examination was identical for both probes and was 0.74 mm. Conclusions: It seems that both types of probes can be used to assess melanoma thickness. The demonstrated correlation of high-frequency ultrasonography (HFUS) thickness with Breslow's scale indicates that the HFUS evaluation can be used in determination of melanoma resection margins as a repeatable, painless, non-invasive test.

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“…Compared with a physical examination, HRUS is very effective in the early detection of lymph node metastases. 6 HRUS of the normal skin shows epidermis as a thin continuous hyperechoic layer with uniform thickness, while the dermis appears relatively less echoic and subcutaneous tissue is characteristically hypoechoic. Main HRUS feature of psoriatic skin are thickened epidermis and dermis, absence of involvement of the subcutaneous tissue and increased vascularity on Doppler study.…”

Section: Discussionmentioning

confidence: 99%

High Resolution Ultrasound in Cutaneous and Subcutaneous Lesions

Einstien¹,

Rangari²,

Kumar³

et al. 2018

IJCMSR

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MATERIAL AND METHODS A prospective study of 100 patients in all age groups with skin lesions based on clinical data who presented to Bowring and Lady Curzon Hospital, Victoria Hospital and Vani Vilas hospital attached to Bangalore Medical College and Research Institute, Bengaluru, from November 2014 to May 2015 were subjected to HRUS examination. Study design: It was a Cross sectional study. Totally 100 patients were studied from November 2014 to May 2016. Inclusion criteria: All clinically suspected patients with superficial skin lesions. Exclusion Criteria: Patients with trauma. After taking Informed consent, all patients included A B S T R A C T Introduction: In the evaluation of cutaneous lesions, High Resolution Ultrasonography (HRUS) with color Doppler is useful as a safe, noninvasive, economical, and repeatable diagnostic procedure that can reduce and replace invasive procedures like fine needle aspirations and biopsies. Analysis of the skin surface allows the investigation of tumor and inflammatory diseases, the measurement of skin thickness. The objective of this study was to evaluate the role of HRUS in cutaneous lesions with histopathological correlation wherever possible. Material and Methods: A prospective study of 100 patients with skin lesions based on clinical data were subjected to HRUS examination. Collected data was analysed by descriptive statistics. Results: The study comprised of a total of 100 patients, out of which 75 were non-neoplastic and 25 were neoplastic lesions. The non-neoplastic lesions included Psoriasis, edema, lymph nodes and vascular malformations. The neoplastic lesions included 16 benign and 9 malignant cases. The observed HRUS and Doppler characteristics of these lesions are discussed in detail. Conclusion: HRUS is non-invasive, affordable, easily available, rapid imaging technology. It can be used to localize the skin lesion, generate differential diagnosis and to follow up known lesion.

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High Resolution Ultrasound Imaging of Melanocytic and Other Pigmented Lesions of the Skin

Cited by 11 publications

References 31 publications

Automated classification of common skin lesions using bioinspired features

Automated classification of common skin lesions using bioinspired features

Evaluation of the clinical usefulness of high-frequency ultrasonography in pre-operative evaluation of cutaneous melanoma – a prospective study

High Resolution Ultrasound in Cutaneous and Subcutaneous Lesions

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