Cystic hygroma is a rare congenital malformation of the lymphatic system. In most centers, surgical excision is considered to be the optimal mode of treatment. Spontaneous resolution of cystic hygroma was briefly described in the literature with unsatisfactory results. Between 1970 and 2003, 14 patients were diagnosed to have cystic hygroma (13 cervical and 1 axillary). A retrospective review was performed. All patients were treated successfully with aspiration alone with a mean follow-up time of 5.75 years. Three patients needed multiple aspirations (average 1.66) with complete resolution. Complications were limited to one case of infection treated with antibiotics with no residual problems. Conservative management of cystic hygroma is a reliable mode of treatment with a low complication rate. Intralesional sclerosant injection and surgery should be reserved for other forms of lymphatic malformations.

Sodium Hypochlorite (NaOCl) is a common irrigation solution used in root canal treatment. It has strong antibacterial and tissue dissolving properties. Nevertheless, it has some serious complications, some of which are life-threatening. A young male presented with severe chemical burn of the right infraorbital area and partial necrosis of the hard palate resulting from extrusion of NaOCl during root canal treatment of the upper right 2nd molar tooth. The patient had a facial scar, and mucosal damage healed nearly completely. Several precautions must be taken during NaOCl use to prevent the spread of the solution into surrounding tissues. Early recognition of NaOCl accident and proper immediate management are important to achieve the best possible outcome.

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