Cytology features of childhood jaw tumors are infrequently reported in the literature. Fine-needle aspiration cytology (FNAC) has been used with good results in the differential diagnosis of bone lesions, being an excellent tool for the diagnosis of metastases and in the frontline approach to primary lesions. We report 3 cases of young children aged 3 years (case 1), 5 months (case 2), and 15 years (case 3) with jaw tumors diagnosed by FNAC. In the first two cases the diagnosis was prognoma, and in the third case cementifying fibroma. Despite the clinical and imaging similarity of the 3 cases – large maxillary/mandibular tumors – their characteristic cytological features allowed a confident diagnosis, excluding other differential alternatives. In both case 1 and case 2 a dual cell population of neuroepithelial and melanocytic cells was identified, consistent with a melanotic neuroectodermal tumor. In case 3 the presence of a bland spindle cell population as well as of several nodular dense eosinophilic, osteoid-like (cement) matrices, indicated a cementifying fibroma. All cases were resected and confirmed by histological examination. A review of the literature, including differential diagnosis, addresses the utility of FNAC in childhood jaw tumors.

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