Pediatric odontogenic fibromyxoma of the mandible: Case report and review of the literature.

BACKGROUND: Odontogenic fibromyxoma is an uncommon benign tumor arising from the maxillofacial bones. Fibromyxomas are rare in children under 10 years of age. Although this tumor is reported most frequently in the mandible for the general population, it has rarely been reported in the mandible in children <10 years of age. METHODS: We reviewed the 39 reported cases of odontogenic fibromyxoma in children under the age of 10. We add 1 case to the literature. RESULTS: This case represents the seventh case of odontogenic fibromyxoma of the mandible in a child under the age of 10 years reported in the English literature. CONCLUSION: A case of pediatric odontogenic fibromyxoma in the mandible is described. Although rare in the pediatric population, odontogenic fibromyxomas should be included as a differential diagnostic consideration when evaluating tumors of the maxillofacial skeleton. Accurate pathologic diagnosis is critical to ensure proper management.

Extranodal follicular dendritic cell tumor of the tonsil: report of a diagnostic pitfall and literature review.

Follicular dendritic cell tumor (FDCT) usually arises in the dendritic reticulum cells of the lymph nodes. Extranodal cases are rare; only 24 cases have been reported in the head and neck region, and most are in the oropharynx. Nine cases of primary FDCT of the tonsil have been reported in English-language literature, to which we add the 10th case. This 77-year-old white woman presented with a tonsillar mass that was misdiagnosed as squamous cell carcinoma. She underwent neoadjuvant radiotherapy plus combined oropharyngeal and mandibular resection with radical neck dissection. Eight years later, she presented with dyspnea and was found to have a lung mass with hilar lymphadenopathy. A biopsy specimen was taken from the hilar lymph nodes, and histologic analysis yielded results similar to those found in the original tumor. Immunohistochemical analysis confirmed that FDCT was present at both sites. We wish to highlight this potential diagnostic pitfall because the treatment and prognosis for FDCT are vastly different from the treatment and prognosis for squamous cell carcinoma of the tonsil.