Angiosarcoma is a rare, aggressive malignant vascular neoplasm with poor prognosis that has a predilection for skin and superficial soft tissue. It can arise spontaneously or in association with factors like chronic lymphedema or radiation therapy. Radiotherapy used to treat invasive breast tumors is a known risk factor for the development of the so‐called radiation‐induced angiosarcoma (RIAS), a condition that has been described in the literature with increasing frequency. Radiation‐induced angiosarcoma of the breast usually arises on the previously irradiated skin area several years after radiotherapy and presents as painless multifocal erythematous patches or plaques similar to a hematoma. Cutaneous biopsy is essential for the diagnosis. Histologically, RIAS is characterized by irregular anastomosing vessels lined by endothelial cells showing nuclear atypia. Treatment is mostly surgical, and mastectomy with negative margins is considered the standard procedure. However, recurrences are common, and an approach combining surgery, chemo‐ and radiotherapy may be more effective. The purpose of this study is to review the most recent medical literature on RIAS of the breast, with emphasis on its pathophysiology, clinical and histological features and current treatment options.

Stiff skin syndrome (SSS) is a rare, scleroderma-like condition that is commonly characterised by stony hard skin and limited joint mobility, in the absence of visceral involvement or immunologic abnormalities. Depending on the distribution of the disease, this disorder can be further categorised into classic (widespread) SSS or its newly described segmental variant. Additional features of this syndrome may include hypertrichosis, lipodystrophy, dysmetria and scoliosis. In this report, we present the case of a patient with segmental SSS and we briefly review the current literature about the topic.

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BACKGROUNDRecently, the interest in minimally invasive techniques in the management of the pilonidal sinus has been rising. The main goal is to avoid the prolonged recovery period associated with traditional surgeries.OBJECTIVETo evaluate the safety and efficacy of a radial diode laser probe in the destruction of the pilonidal sinus.METHODSTwenty-seven patients with pilonidal sinus were treated with a radial 1,470-nm diode laser between July 2018 and August 2020 and were examined retrospectively. Charts were reviewed and patients were questioned by telephone about their postlaser recovery period.RESULTSTwenty-five patients were included. The overall success rate was 84%. Recurrence rate was 9.5%, after a mean follow-up of 8.3 months. The mean duration of analgesia intake was 2.5 days, and the mean period required to return to daily activities was 5.8 days. Sixteen percent of the patients developed a small postoperative hemorrhage as a complication.CONCLUSIONThis study demonstrated that radial diode laser is safe, effective, and associated with a low recurrence rate in the treatment of mild pilonidal sinus disease. Dermatologists can perform it easily in the outpatient clinic, with minimal postoperative pain and a fast return to the patients' daily activities.

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