Maxillary lesions rarely arise in infants and children. This paper reports 3 pedia tric cases of maxillary lesions which we encountered recently. Case 1: A 2-year-3-month-old boy was brought to our hospital with left maxillary swelling. Diagnosed as having an odontogenic cyst, he underwent a radical operation of the maxillary sinus. Case 2: A girl without defecation since birth was diagnosed as having ileus and surgically treated. A pathological diagnosis of cystic fibrosis was established postoperatively. She was referred to our department for the examination of increasing nasal obstruction. The maxillary bone was swollen on both sides. Because the patient complained of cheek pain, local therapy was performed through a counter opening of the maxillary sinus created in the nasal cavity. Case 3: A 15-year-old-girl with congenital hydrocephalus had been followed-up at the department of neurosurgery. She was referred to our department for the examination of swollen cheeks. CT revealed large cystic lesions in the bilateral maxillary sinuses. Radical operation of the maxillary sinus was performed. The post operative diagnosis of odontogenic keratocyst was made and pathological examination of biopsy specimens suggested the diagnosis of Gorlin syndrome. The patient should be carefully followed-up because of the malignant potential of the disease. Although maxillary lesions rarely arise in infants and children, clinicians should be aware of these rare conditions.
