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.

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.

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).

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.

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.