Pseudolymphoma tattoo-induced.

Tattooing has become more and more popular in today's society. The most common dermatological tattoo complications are represented by hypersensitivity reaction to tattoo pigments like irritant and allergical contact dermatitis, development of lichenoid areas and granulomatous responses, such as sarcoid granulomas or foreign body granulomas. Less frequently patients developing discoid lupus erythematous have been reported. Pseudolymphoma is an uncommon reactive lymphocytic proliferation mimicking the histological and clinical features of a malignant skin lymphoma. We herein report a pseuldoymphoma limited to the red area of a multicolour tattoo of the leg.

Idiopathic hypocomplementemic urticarial vasculitis-linked neuropathy.

Hypocomplementemic urticarial vasculitis (HUV) is a rare form of cutaneous small-vessel vasculitis characterized by recurrent episodes of urticaria and painful, tender, burning or itchy skin lesions, often associated with extracutaneous involvement but usually with no significant peripheral nerve damage. We describe a patient with an HUV of undetermined cause that developed a progressive multifocal sensory neuropathy whose symptoms were temporarily relieved by intravenous immunoglobulin treatment. Sural nerve biopsy showed asymmetrical multifocal nerve fiber loss and axon degeneration in nerve fascicles, a picture suggestive of ischemic damage as a likely result of a vasculitic process. We point out that an axonal neuropathy may complicate idiopathic HUV and suggest looking for peripheral nerve involvement in HUV patients.