The Role of Color and Morphologic Characteristics in Dermoscopic Diagnosis

Bajaj, Shirin; Marchetti, Michael A.; Navarrete‐Dechent, Cristián; Dusza, Stephen W.; Kose, Katsumi; Marghoob, Ashfaq A.

doi:10.1001/jamadermatol.2016.0270

Cited by 16 publications

(8 citation statements)

References 26 publications

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“…9 Yellowish-brown background was noted in half of the patients and it was due to wide deposition of hemosiderin along with perivascular infiltrate. 10 White rosettes are special structures seen as four white clods coming together in a central meeting point. They are due to the optical phenomenon with polarized light.…”

Section: Discussionmentioning

confidence: 99%

Progressive pigmented purpuric dermatosis in skin of color: a dermoscopic and histopathological correlation

et al. 2022

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Background: Progressive pigmented purpuric dermatosis (PPPD) is a chronic cutaneous presents with petechiae, purpura on hyperpigmented yellowish-brown macules or patches. Diagnosis is straight forward, sometimes may be challenging for the diagnosis. Dermoscopy is a non-invasive tool. It gives characteristic patterns in PPPD. However, dermoscopic descriptions in skin of color are limited to case reports. Here, dermoscopic evaluation in skin of color is studied in detail. Methods: It was a cross sectional observation study. Ethical clearance and written consent was obtained. Patients of skin type 4 and 5, attending dermatology clinic with suspected lesions of PPPD were selected serially. Handheld dermoscope was used for examination. Site for dermoscopic examination was considered as target area. Skin biopsy was taken. Dermoscopic patterns were analysed and features were correlated with histopathological changes.Results: Totally 30 patients with 27 males and 3 females were enrolled. Schamberg’s disease was commonest type noted in 21patients. Eczematoid, lichen aureus, and lichenoid types were seen in 2 (6.7%) each. Hence, overall occurrence of Schamberg’s disease was statistically significant (p=0.028). Commonest dermoscopic findings were brown pigment network and yellowish-brown dots/globules. Least common features included linear vessels and bluish globules. Distorted pigment network noted in 29 (96.7%).Conclusions: Dermoscopy of PPPD shows characteristic patterns of which pigment network, red globules and yellowish-brown globules are the basic features. These features correlate well with histopathological changes. Yellowish-brown globules and background are prominently observed in skin of color. Larger studies are recommended to validate these differences.

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Section: Discussionmentioning

confidence: 99%

Progressive pigmented purpuric dermatosis in skin of color: a dermoscopic and histopathological correlation

et al. 2022

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“…Lesional appearances of CP, HZ, HL, PV, BP, PF, EM, HFMD, and IBR, similar to the present study, were noted by Nayak et al . [ 13 ] The stage-wise evolution of CP lesions was in concordance with that noted by Bajaj et al .,[ 14 ] Celebi et al .,[ 15 ] Johr et al .,[ 16 ] Weismann et al .,[ 17 ] and Xu et al . [ 18 ] The 'cobblestone' appearance of early lesions (multiple grouped vesicles), 'reticulate' pattern of intermediate lesions (as lobules coalesced together), and 'solar eclipse' (necrotic grayish center surrounded by bright red inflammatory halo) type of manifestation of late stages of HZ were also noted by these researchers.…”

Section: Discussionmentioning

confidence: 99%

“…[ 18 ] The 'cobblestone' appearance of early lesions (multiple grouped vesicles), 'reticulate' pattern of intermediate lesions (as lobules coalesced together), and 'solar eclipse' (necrotic grayish center surrounded by bright red inflammatory halo) type of manifestation of late stages of HZ were also noted by these researchers. [ 14 15 16 17 18 ]…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Dermoscopic Patterns of Vesiculobullous Disorders

Narkhede

Nikham

Jamale

et al. 2021

Indian Journal of Dermatology

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Background: Clinical diagnosis of vesiculobullous disorders (VBD) is not always straightforward. It is a challenge for a dermatologist to make the right diagnosis noninvasively in a short time. Objective: To evaluate dermoscopic patterns associated with vesiculobullous disorders. Methods: A total of 230 patients, irrespective of age and gender, with a history and clinical presentation suggestive of VBD (including primarily infectious, inflammatory, genetic, antibody-mediated, mechanical, environmental, metabolic, and drug-related) were recruited into the study. Patients with secondarily infected lesions were excluded. Dermoscopic examination along with Tzanck smear/skin biopsy smear test was performed on the most representative lesions. Data were compiled and statistically analyzed using SPSS version 21.0. Results: Lesions with erythematous (vascular) and yellowish (serum) translucent background with regular margins were seen in most of the VBD studied. Chickenpox (CP) and herpes zoster (HZ) lesions evolved with the progress of their clinical stages. Follicular and eccrine openings were commonly seen, but the pigmentation around them was specific to pemphigus vulgaris. A distorted pigment network was noted in bullous pemphigoid. White rosettes (keratin blockage) were characteristic of epidermolysis bullosa, Wickham striae (orthokeratosis) of lichen planus, and crumpled fabric appearance (flaccidity) of Hailey-Hailey disease. Globules/dots (microvesicles) of different colors were also seen in various VBD. Blue/black color usually corresponded to retained melanin. Conclusion: Some dermoscopic patterns are observed consistently with certain diseases, and these can be used for their diagnosis, complementary to histopathological examination.

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“…Although in ref. [21], they used grayscale images to classify the type of skin lesions instead of utilizing color images.…”

Section: Review and Backgroundmentioning

confidence: 99%

Prediction of Dermoscopy Patterns for Recognition of both Melanocytic and Non-Melanocytic Skin Lesions

2016

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Abstract:A differentiation between all types of melanocytic and non-melanocytic skin lesions (MnM-SK) is a challenging task for both computer-aided diagnosis (CAD) and dermatologists due to the complex structure of patterns. The dermatologists are widely using pattern analysis as a first step with clinical attributes to recognize all categories of pigmented skin lesions (PSLs). To increase the diagnostic accuracy of CAD systems, a new pattern classification algorithm is proposed to predict skin lesions patterns by integrating the majority voting (MV-SVM) scheme with multi-class support vector machine (SVM). The optimal color and texture features are also extracted from each region-of-interest (ROI) dermoscopy image and then these normalized features are fed into an MV-SVM classifier to recognize seven classes. The overall system is evaluated using a dataset of 350 dermoscopy images (50 ROIs per class). On average, the sensitivity of 94%, specificity of 84%, 93% of accuracy and area under the receiver operating curve (AUC) of 0.94 are achieved by the proposed MnM-SK system compared to state-of-the-art methods. The obtained result indicates that the MnM-SK system is successful for obtaining the high level of diagnostic accuracy. Thus, it can be used as an alternative pattern classification system to differentiate among all types of pigmented skin lesions (PSLs).

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The Role of Color and Morphologic Characteristics in Dermoscopic Diagnosis

Cited by 16 publications

References 26 publications

Progressive pigmented purpuric dermatosis in skin of color: a dermoscopic and histopathological correlation

Progressive pigmented purpuric dermatosis in skin of color: a dermoscopic and histopathological correlation

Evaluation of Dermoscopic Patterns of Vesiculobullous Disorders

Prediction of Dermoscopy Patterns for Recognition of both Melanocytic and Non-Melanocytic Skin Lesions

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