Matthew Lewis Kashima, MD

Jenny X. Chen is an expert in the treatment of ear conditions including hearing loss, vertigo, vestibular schwannomas (acoustic neuromas), cholesteatomas, cerebrospinal fluid leaks and eardrum perforations. She is trained in minimally invasive, endoscopic surgical approaches to treating the ear and performs surgeries including cochlear implants, bone-anchored hearing aids and stapedectomy. She treats patients of all ages. Dr. Chen earned her medical degree from Harvard Medical School. She completed residency training in otolaryngology–head and neck surgery at Massachusetts Eye and Ear/Harvard Medical School and advanced fellowship training in otology/neurotology at the Johns Hopkins University School of Medicine. Dr. Chen’s research interests are in surgical education, competency-based medical education, as well as health equity for patients with hearing loss. She is the co-director of undergraduate medical education for the Department of Otolaryngology–Head and Neck Surgery at Johns Hopkins.

The primary clinical interests of James Clark lie in comprehensive diagnosis and management of swallowing disorders, with a focus on deglutition difficulties resulting from head and neck cancer. Additionally, Dr. Clark treats a broad spectrum of upper aerodigestive tract disorders, including but not limited to laryngopharyngeal reflux, chronic cough, Zenker’s diverticulum, dysphagia and esophageal motility disorders. Dr. Clark performs minimally invasive in-office procedures such as unsedated transnasal esophagoscopy and sialendoscopy. His research interests encompass innovative technologies for diagnosis and rehabilitation of swallowing disorders.

Kevin Motz is fellowship-trained in laryngology and sleep medicine. His clinical practice focuses on the management of airway and voice disorders, with a particular emphasis on the management of laryngotracheal stenosis and idiopathic subglottic stenosis. Additionally, Dr. Motz sees patients with obstructive sleep apnea who are intolerant of continuous positive airway pressure (CPAP), offering surgical and nonsurgical approaches to care.His research interests include investigating immunologic mechanisms promoting fibrosis in laryngotracheal stenosis. Specifically, he is focused on determining how innate and adaptive immune cells influence fibroblast activation, function and, ultimately, wound healing in the larynx and trachea. In addition, Dr. Motz is exploring identifying unique physiologic biomarkers in patients with obstructive sleep apnea, which may predict a successful response to non-CPAP therapies.