Introduction: Transverse over curvature is a commoninaes the tic and pain ful deformity of the nail plate. There are several conservative and surgical techniques for trea ting this condition. We describe a simple and cost effective techni que using auto logous dermal grafts.

Keywords: NAIL DISEASES, NAILS, NAILS, MALFORMED, NAILS, INGROWN, AMBULATORY SURGICAL PROCEDURES

Onychomatricoma is a benign neoplasia that occurs pecifically in the nail apparatus. It was described in 1992, and is the only tumor in which the change of the nail plate is actively caused by the lesion. It lies in the nail matrix,and has fingerlike projections that are embedded in the nail plate, resulting in thickening, longitudinal grooves, yellow discoloration and splinter hemorrhages. Although described as a rare tumor, it is believed to be underdiagnosed. The present study is aimed at reviewing onychomatricoma’s clinical features as well as the complementary examinations that are used to recognize and diagnose this tumor.

Keywords: NAIL DISEASES, NAILS / PATHOLOGY, NEOPLASMS

The observation of mucous membranes should be part of a dermatological examination. It is known that early diagnosis is critical for the prognosis of patients with malignant melanocytic lesions. Nevertheless, integrating this step into the examination routine and performing a differential diagnosis between benign and malignant mucosal lesions with only clinical signs, are great challenges. Dermoscopy is still seldom-used for pigmented lesions of mucous membranes, however recent studies have shown its potential. In light of a case of melanoma of the lip, the authors provide tips and data from the literature that highlight the usefulness of the technique, and support the use of dermoscopic examination in the dermatologist's routine.

Keywords: DERMOSCOPY; HUTCHINSON'S MELANOTIC FRECKLE; KERATOSIS, ACTINIC; FACE.

The present article discusses the importance of differential diagnosis with lesions located in the umbilicus. A case of verrucous nevus is described in this location, emphasizing the role of dermoscopy in the diagnosis.

Keywords: MELANOMA, EPIDEMIOLOGY, SKIN NEOPLASMS.

Lichen planus pigmentosus is a rare variant of lichen planus and represents a therapeutic challenge. Dermabrasion was performed with a good clinical response in the treatment of this condition, on the face of a female patient who also bears frontal fibrosing alopecia.

Keywords: DERMABRASION; LICHENOID ERUPTIONS; ALOPECIA.

The acquired perforating dermatosis is constituted by a group of diseases whose main characteristic is the transepithelial elimination of altered dermal material. It has the clinical appearance of crateriform papules or nodules, with central keratotic plug, which may suggest some kind of transepithelial purging; nevertheless the final diagnosis is histologic. The dermoscopic examination is a useful tool that helps to exclude similar dermatoses, such as nodular prurigo and hypertrophic lichen planus. The present article discusses the clinical and dermoscopic correlation of this dermatosis.

Keywords: DERMOSCOPY; PRURIGO; DIAGNOSIS, DIFFERENTIAL

INTRODUCTION: Idiopathic guttate hypomelanosis (IGH) is a common photoaging manifestation, with no standard treatment and presenting mixed results to interventions. In Brazil, the use of micro-needling associated with 5-fluorouracil (5-FU) has been proposed to treat IGH.
OBJECTIVE: To compare the use of MMP^® (micro-infusion of drugs on the skin) with 5-FU, with MMP^® only as micro-needling (with no drugs), and intralesional 5-FU injected with an insulin syringe in the treatment of IGH.
METHODS: In a single blind randomized clinical trial, we compared the three treatments: MMP^® versus MMP with 5-FU and intralesional 5-FU injection for 180 IGH lesions in the forearm of nine patients.
RESULTS: After two treatment sessions, 5-FU alone was the most effective treatment, with statistical significance, compared with micro-needling alone. MMP+5-FU efficacy was lower than intralesional 5-FU injection and higher than micro-needling alone, although without statistical significance.
CONCLUSIONS: The intralesional application of 5-FU was more effective in the treatment of solar leukoderma. The use of a smaller quantity of medication is the great advantage of the MMP + 5-FU technique. Further studies are needed to standardize these techniques.

Keywords: Drug delivery systems; Fluorouracil; Hypopigmentation; Skin aging