6 Vassiliadis T, Garipidou V, Tziomalos K et al. Prevention of hepatitis B reactivation with lamivudine in hepatitis B virus carriers with hematologic malignancies treated with chemotherapy -a prospective case series. al. Frequency of hepatitis B virus reactivation in cancer patients undergoing cytotoxic chemotherapy: a prospective study of 626 patients with identification of risk factors. J Med Virol 2000; 62:299-307. 9 Yeo W, Zee B, Zhong S et al. Comprehensive analysis of risk factors associating with hepatitis B virus (HBV) reactivation in cancer patients undergoing cytotoxic chemotherapy. Br J Cancer 2004; 90:1306-11. 10 Yi N-J, Suh K-S, Cho JY et al. Recurrence of hepatitis B is associated with cumulative corticosteroid dose and chemotherapy against hepatocellular carcinoma recurrence after liver transplantation. Liver Transpl 2007; 13:451-8. Conflicts of interest: none declared.SIR, We present a 15-year-old boy with unilateral segmental acne on his right chest, trunk, shoulder and arm, including the extensor surface of the forearm (Fig. 1a). Multiple comedones as well as inflammatory papules and pustules were found in linear or whorled skin areas reflecting the lines of Blaschko.

A 26-year-old man presented with an unusual skin lesion consisting of a hairless area on the left leg studded with reddish-brown papules, together with follicular hyperkeratosis and circumscribed anhidrosis. Skin biopsies showed dense lymphocytic infiltrates in the dermis and around hyperplastic sweat ducts and glands. Similar clinical and histological features have been described in two previous case reports. We propose the term syringolymphoid hyperplasia with alopecia for this unusual skin disease.

A 5-year-old girl with a unilateral linear systematized skin lesion showing the clinical, histological and ultrastructural features of Hailey-Hailey disease is described. We suggest that this relapsing linear acantholytic dermatosis represents a new distinct entity within the spectrum of unilateral linear skin diseases.

A 48-year-old male patient with atypical tuberous myxedema Jadassohn-Dössekker, characterized by nodules on both upper legs with mucin deposits, is described. Atypical tuberous myxedema Jadassohn-Dössekker can be classified together with lichen myxedematosus and scleromyxedema Arndt-Gottron as normothyrotic myxodermia. It can be distinguished from lichen myxedematosus only by the size of the lesions. The pathogenesis is unknown.

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