[Four Cases of Other Iatrogenic Immunodeficiency-associated Lymphoproliferative Disorders in the Head and Neck Region].

Other iatrogenic immunodeficiency-associated lymphoproliferative disorders (OIIA-LPD) comprise lymphoid proliferations or lymphomas that arise in patients treated with immunosuppressive drugs for autoimmune diseases, especially rheumatoid arthritis (RA) treated with methotrexate (MTX). MTX has been increasingly administered to patients with RA, resulting in methotrexate-associated lymphoproliferative disorder (MTX-LPD) in patients. We report herein on four cases of patients with RA, who diagnosed with head and neck region.

[A Case of Juvenile-Onset Laryngeal Papillomatosis Requiring Emergency Airway Management].

Juvenile-onset laryngeal papillomatosis has a serious tendency for rapid growth and repeated recurrence. Thus, patience and prudence are required for the successful management of this pathology. We report herein on 2-year and 4-month-old boy with juvenile-onset laryngeal papillomatosis, which caused remarkable airway constriction that required urgent airway management.