Dermoscopy of haemosiderotic/aneurysmal dermatofibroma: A morphological study of 110 cases.

Background: Haemosiderotic and aneurysmal dermatofibromas are uncommon and frequently misdiagnosed lesions, which can be considered as different histopathological stages of the same tumour. A dermoscopic diagnosis testing accuracy has not been performed for these tumours to date.

Objectives: To determine the diagnostic significance of dermoscopic structures and patterns associated with haemosiderotic/ aneurysmal dermatofibromas in a large series.

Dermoscopy of glomus tumour: a cross-sectional study of 86 cases.

Background: Glomus tumours (GTs) are benign cutaneous neoplasms derived from the neuromyoarterial apparatus with a strong predilection for acral sites, especially the subungual space. Current data regarding dermoscopy of these lesions are very limited.

Objectives: To analyse the dermoscopic structures and patterns seen in a large series of subungual (SUGTs) and extraungual glomus tumours (EUGTs) and to determine their diagnostic significance.

Intralesional photodynamic therapy in hidradenitis suppurativa: Getting closer to the target.

Background: The successful treatment of hidradenitis suppurativa (HS) with intralesional photodynamic therapy (IL-PDT) has been previously reported in some case series published a few years ago. We present additional data and patient outcome for this form of PDT.

Methods: This is an observational retrospective study including all patients diagnosed with HS and treated with IL-PDT in the Hospital Universitari Son Espases from February 2019 to February 2020.

The Usefulness of Dermoscopy for the Recognition of Malignant Collision Tumors.

Background: Preoperative diagnosis of malignant collision tumors (MCT) is extremely difficult. The value of dermoscopy to improve the correct detection of these tumors has not been previously studied. This study aims to evaluate the diagnostic accuracy of MCT with and without dermoscopy and to describe the dermoscopic features of a large series of MCT.

Suppurative granulomatous tattoo reaction: Complete remission with photodynamic therapy.

Tattoo complications are an increasing reason for dermatological consultation in recent years, becoming a therapeutic challenge in some cases. We present a case of a suppurative granulomatous reaction in a tattoo resistant to oral antibiotic and topical corticosteroid treatment that resolved after four sessions of photodynamic therapy (PDT) with methyl aminolevulinate, possibly due to its anti-inflammatory and antimicrobial action, with an excellent aesthetic result. We suggest that the clinical utility of PDT may be expanded to treatment of tattoo complications, as well as in cutaneous infections of unknown microorganisms resistant to antibiotics.

Dermoscopy of cutaneous smooth muscle neoplasms: a morphological study of 136 cases.

Background: A variety of cutaneous smooth muscle neoplasms may arise in the skin and are frequently unrecognized by clinicians. There is sparse data relating to the dermoscopy of piloleiomyomas (PL), and nothing has been published about the dermoscopy of angioleiomyomas (AL) and leiomyosarcomas (LS).

Objectives: To evaluate the morphological findings of a large series of cutaneous PL, AL and LS under dermoscopic observation, comparing these findings among them.

Dermoscopy of arteriovenous tumour: A morphological study of 39 cases.

Background/objectives: Arteriovenous tumour is a distinct, benign, acquired vascular lesion that can be misdiagnosed.

Methods: A dermoscopic examination of 39 cases of arteriovenous tumours collected from four Spanish hospitals was performed to evaluate specific dermoscopic criteria and patterns.

Results: The most common structures found were vascular, 95% of cases (37/39); 90% (35/39) were non-arborising telangiectasia.

Dermoscopy of lymphangioma circumscriptum: A morphological study of 45 cases.

Background/objectives: The dermoscopy of lymphangioma circumscriptum, also known as superficial lymphatic malformation, remains to be clarified.

Methods: Digital dermoscopic images of 45 histopathologically confirmed cases of lymphangioma circumscriptum collected from nine hospitals in Spain, Italy and Turkey were evaluated for the presence of dermoscopic structures and patterns.

Results: Our study shows that the most common structure found in lymphangioma circumscriptum was the presence of lacunae (89% of cases).

Amelanotic naevoid melanoma in a 16-month-old albino infant.

Melanoma in individuals with oculocutaneous albinism has been reported in the literature to be rare compared with the more common occurrence of squamous cell carcinoma and basal cell carcinoma. We present a singular case of amelanotic naevoid melanoma arising from a small congenital naevus in a 16-month old albino boy, the youngest reported to date.

Extensive Acquired Telangiectasias: Comparison of Generalized Essential Telangiectasia and Cutaneous Collagenous Vasculopathy.

The late development of symmetrical, ascending telangiectasias over an extensive area of the skin with no associated systemic manifestations is a common presentation of generalized essential telangiectasia (GET). It was recently suggested that cutaneous collagenous vasculopathy (CCV) is clinically identical to GET but that the 2 conditions can be distinguished by their distinctive histopathologic findings. We present 2 patients, both women, with multiple telangiectasias and describe the histopathologic findings that led to the diagnoses of GET and CCV.

Cost-Effectiveness and Cost-Utility Analysis of Ingenol Mebutate Versus Diclofenac 3% and Imiquimod 5% in the Treatment of Actinic Keratosis in Spain.

Objective: To perform a cost-effectiveness and cost-utility analysis of ingenol mebutate in the treatment of actinic keratosis in Spain.

Methods: We used an adapted Markov model to simulate outcomes in a cohort of patients (mean age, 73 years) with actinic keratosis over a 5-year period. The comparators were diclofenac 3% and imiquimod 5%.

Dermoscopic Findings of Jellyfish Stings Caused by Pelagia noctiluca.

Background And Objectives: Jellyfish are free-living members of the phylum Cnidaria who share a specialized stinging cell, the cnidocyte. Pelagia noctiluca is the most frequent and toxic jellyfish species found in the Balearic beaches and cnidocytes are arranged in pigmented clusters called "warts". Dermoscopy continues to expand its use much beyond the pigmentary lesions and to date, there is no data regarding dermoscopic findings in jellyfish stings.

Dermoscopy of Nodular Hidradenoma, a Great Masquerader: A Morphological Study of 28 Cases.

Background: Nodular hidradenoma is an uncommon, benign, adnexal neoplasm of apocrine origin which is a clinical simulator of other tumours.

Objective: The aim of this study was to evaluate the morphological findings of a large series of nodular hidradenomas under dermoscopic observation.

Methods: Dermoscopic examination of 28 cases of nodular hidradenomas was performed to evaluate specific dermoscopic criteria and patterns.

Dermoscopy of tumours arising in naevus sebaceous: a morphological study of 58 cases.

Background: Naevus sebaceous is a congenital hamartoma commonly associated with the development of secondary neoplasms. There are sparse data relating to the dermoscopy of tumours arising in naevus sebaceous.

Objectives: To evaluate the dermoscopic features of a large series of neoplasms arising in naevus sebaceous.

Dermoscopic Visualization of Vellus Hair Involvement in Tinea Corporis: A Criterion for Systemic Antifungal Therapy?

Dermoscopy has been shown to be a valuable tool in the diagnosis and monitoring of several infectious diseases. We report a case of tinea corporis in an infant in whom dermoscopy helped us to determine vellus hair involvement, causing treatment to be switched from topical to systemic antifungal therapy.