The authors report a case of "harlequin fetus" which was brought to their attention. The report was justified not only by the rarity of the disease, but above all because, after having examined the literature on the topic, this appears to be the third case treated with etretinate. The case in question was a female affected by congenital ichthyosis in its total form and by initial necrosis of the extremities. Etretinate treatment gave good results in terms of cutaneous modifications: reduction of hyperkeratosis, disappearance of ectropion and eclabium. Therefore, although the patient died when 16 days old due to sudden renal insufficiency, the case confirms the two previous reports on the value of this therapy.