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Granuloma annulare (GA) and necrobiosis lipoidica (NL) are the most common granulomatous skin diseases (GSD). Although GA usually follows a self-limiting course, it has been reported to occur in association with haematologic neoplasias and solid tumours. 1,2 The aetio- pathogenesis of NL is strongly associated with diabetes mellitus, and nonhealing ulcers and squamous cell carcinoma have been reported to develop occasionally on chronic NL lesions.
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Lallas et al. (2013) studied this question.
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