Rosai-Dorfman disease (RDD), also known as sinus histiocytosis with massive lymphadenopathy, is a rare and benign proliferative disease that affects histiocytes. Its etiology remains unclear. Rosai-Dorfman disease primarily affects lymph nodes with many extranodal manifestations present, including cutaneous, pulmonary, ophthalmic, and gastrointestinal. Diagnosis is mainly histologic with the presence of Rosai-Dorfman cells, which demonstrate emperipolesis. We report a case of a 30-year-old man who presented with a facial cutaneous mass and was diagnosed with RDD; he underwent surgical excision. The patient experienced recurrent lesions on the surgical scar and parotid gland as well as the lower back. Treatment consisted of systemic steroids and surgical excision.

Objective:To study if nasal endoscope can be a reliable tool in assessing patients with allergic rhinitis.Materials and Methods:A prospective study. Patients who were diagnosed with allergic rhinitis underwent a nasal endoscopic examination performed by two physicians blinded to the scoring of each other. A correlation was made among symptom severity, endoscopic findings, and interrater variability.Results:Ninety patients were included in the study: 34 patients had mild disease and 56 had moderate-to-severe allergic rhinitis according to the Allergic Rhinitis and its Impact on Asthma guidelines. Increases in mucosal edema and bluish discoloration were predictive of the severity of allergic rhinitis disease (p < 0.05). The presence of nasal secretions was not predictive of allergic rhinitis. Interrater reliability was fair for mucosal edema, moderate-to-almost perfect for the rest of the endoscopic findings.Conclusion:Nasal endoscopy may reveal signs that are predictive of the severity of allergic rhinitis. A detailed checklist is needed for the nasal endoscopic examination to decrease interrater variability.

The pericranium is a vascularized structure that can be used for the treatment of complex scalp and skull defects. It is also utilized as a prophylactic measure to prevent wound complications in high-risk patients. In this study, we looked at the use of the pericranial flap in pediatric patients. A retrospective chart review was done in the American University of Beirut Medical Center from February 2010 to 2020. Ten pediatric patients were identified who required either prophylactic pericranial flap (n  =  3) or for treatment of a chronic draining sinus (n =  7). Patients were followed up for an average of 23 days. There were no cases of infection, hematoma, seroma, or meningitis. Only 1 case developed dehiscence of the skin. It was managed conservatively and healed within 2 weeks. The pericranial flap is a workhorse flap for scalp and skull reconstruction, with no donor site morbidity and thus should always be considered.