An unusually large onychomatricoma.

Onychomatricoma is a rare benign tumour of the nail matrix first described in 1992, and since then, no more than 80 cases have been reported. Despite distinct clinical characteristics, it is frequently misdiagnosed as onychomycosis partly due to remaining an unknown entity. The authors present the case of a patient with a 30-year history of nail abnormalities with more recent growth to alarming dimensions.

Eruptive collagenoma in a child.

Eruptive collagenoma is a rare entity, with unknownetiology, considered to be a type of connective tissuenevus composed of collagen. It is usually reported inyoung adults occurring predominantly on the trunkand extremities. Systemic findings and family historyof a similar condition are not typically associated andthe prognosis is excellent.

Giant subungual glomus tumor: clinical, dermoscopy, imagiologic and surgery details.

Glomus tumor is a rare benign vascular hamartoma derived from the modified smooth muscle cells of the glomus body. Paroxysmal pain is the leading symptom. A 78-year-old woman presented at our clinic with a 50-year history of a slow growing painful purple blue tender nodule under the right fourth finger nail.

Variants of dermatofibroma--a histopathological study.

Several variants of dermatofibroma have been described. They are essentially distinguished by their clinical and histopathological features. To review the mainfeaturesof these variants, a retrospective study of skin biopsies and tissue excisions of dermatofibromasperformed in the dermatology and venereology service at the Hospital Garcia de Orta between May 2007 and April 2012 was carried out.

Z-Plasty: useful uses in dermatologic surgery.

Z-Plasty is a procedure involving the transposition of two interdigitating triangular flaps. This technique is useful in a number of dermatological procedures. It can be used to correct defects resulting from surgical complications.

Using 80% trichloroacetic acid in the treatment of ingrown toenails.

Background: Ingrown nails are a very common problem. There are different stages of disease and diverse therapeutic options. Phenol and sodium hydroxide are commonly used agents for chemical matricectomy but both frequently entail excessive healing times.

Perforating Granuloma Annulare - An Unusual Subtype of a Common Disease.

Perforating granuloma annulare (GA) is a rare subset of GA with an unknown etiology and chronic course. Herein, we report the case of 72 year-old women with a 3-month history of a post-traumatic, persistent, erythematous and exudative plaque located on her left leg. Differential diagnosis included mycobacterial infection, subcutaneous mycosis, perforating dermatoses, pyoderma and squamous cell carcinoma.

Photoletter to the editor - Calciphylaxis: a diagnostic and therapeutic challenge.

Calciphylaxis is an uncommon necrotizing dermal condition, most often related to end-stage renal disease, associated with secondary hyperparathyroidism. The incidence is 1-4% per year in dialyzed patients. The condition is characterized by microcalcification of small and medium-sized blood vessels, causing cutaneous and soft tissue necrosis.

Photoletter to the editor: Botryomycosis in an immunocompetent woman.

Botryomycosis is a chronic, granulomatous infection of the skin, soft tissue and viscera. It is uncommon and mainly occurs in immunocompromised patients. Splendore-Hoeppli phenomenon represents an immunological host reaction to antigens of infectious and non-infectious agents.

Photoletter to the editor: Atrophic dermatofibrosarcoma protuberans with minimal clinical manifestation.

Dermatofibrosarcoma protuberans is an uncommon soft tissue neoplasm. In the vast majority of cases it presents as a nodule or a firm tumor that can reach massive dimensions producing the protuberant nodules for which it is named. We report a case of a 34-year-old woman presented at our department with an 8-year history of a small and discretely erythematous supraclavicular atrophic plaque.

Cutaneous thrombosis related to paroxysmal nocturnal hemoglobinuria: clinical report.

Paroxysmal nocturnal hemoglobinuria is a clonal stem cell disorder typically characterized by hemolysis, bone marrow failure, and venous thrombosis. The latter can affect up to 40 percent of patients and is a significant cause of mortality. Despite being recognized as a possible complication, cutaneous thrombosis is quite uncommon and a variety of findings have been reported.