Dermoscopy improves diagnostic accuracy for clinically amelanotic nodules.

Background/objectives: Amelanotic nodular melanomas are notoriously difficult to diagnose and are responsible for a disproportionate burden of melanoma mortality. It is important to distinguish them from other amelanotic nodules. This study aimed to describe the dermoscopic features of a series of nodular melanomas and other amelanotic nodules and to determine whether dermoscopy improves diagnostic accuracy.

Two cases of amoxycillin-induced follicular acute localised exanthematous pustulosis.

We report two cases of Caucasian women who developed folliculocentric pustulosis after exposure to amoxycillin. A literature review found that most amoxycillin-related pustular eruptions were reported as acute generalised exanthematous pustulosis (AGEP) or acute localised exanthematous pustulosis (ALEP). Histopathology from both our cases showed sterile suppurative folliculitis, which resolved on the cessation of amoxycillin.

Dermoscopic characteristics of nodular squamous cell carcinoma and keratoacanthoma.

Background: Nodular squamous cell carcinoma (SCC) and keratoacanthoma (KA) may mimic a variety of other benign and malignant non-pigmented nodules.

Objectives: To analyze the dermoscopic characteristics of nodular SCC and KA.

Patients/methods: Retrospective analysis of 50 nodular SCCs and 8 KAs collected from a tertiary dermatology referral center and a private dermatology practice in Melbourne, Australia, between 1 September 2009 and 1 October 2012.

IgG4-related disease with cutaneous manifestations treated with rituximab: case report and literature review.

Immunoglobulin type gamma 4 (Ig)G4-related disease (IgG4-RD) is a relatively recently described clinical entity characterised by elevated levels of serum IgG4 and tissue infiltration of IgG4+ plasma cells in various organ systems. Cutaneous involvement is rare but is becoming increasingly appreciated; typically presenting as erythematous papules and/or nodules that are commonly pruritic. We report a case of IgG4-RD presenting with persistent pruritic papules and unilateral parotid swelling.

Clinical and dermoscopic characteristics of Merkel cell carcinoma.

Background: Merkel cell carcinoma (MCC) is an aggressive cutaneous malignancy with a high mortality rate. Diagnosis is often delayed.

Objectives: To characterize the dermoscopic features of MCC.