-Case Reports-

Use of Sialendoscopy to Diagnose Sialodochitis Fibrinosa: A Case Report

Takeshi Matsunobu^1,*, Hirotaka Suzuki¹, Akira Shimizu², Koji Sakamoto¹ and Kimihiro Okubo¹

¹Department of Otolaryngology-Head and Neck Surgery, Nippon Medical School, Tokyo, Japan
²Department of Analytical Human Pathology, Nippon Medical School, Tokyo, Japan
^*Present address: Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, Saitama, Japan

First reported by Kussmaul in 1879, sialodochitis fibrinosa is a disease of the parotid and/or submandibular glands that is characterized by pain and diffuse swelling. It is believed to be caused by obstruction of the salivary duct by mucofibrinous plugs and is often misdiagnosed as other types of sialadenitis, such as Sjögren's syndrome, or sialadenitis caused by bacterial or viral infection. Although specific diagnostic criteria have not been defined, the typical pathological finding of sialodochitis fibrinosa is infiltration of lymphocytes and eosinophils into the interstitium around the salivary ducts. Sialendoscopy, a minimally invasive endoscopic technique, has recently been used to diagnose and treat diseases of the salivary glands. This new technique can be used to irrigate and dilate the salivary gland ducts under direct vision. We successfully used sialendoscopy to diagnose and treat sialodochitis fibrinosa, making this the first reported use of this technique for salivary gland biopsies. Sialendoscopy is a modern approach to salivary gland disorders that was helpful for understanding, diagnosing, and managing sialodochitis fibrinosa.

J Nippon Med Sch 2025; 92: 440-445

Keywords
sialendoscopy, sialodochitis, salivary gland, Kussmaul disease

Correspondence to
Takeshi Matsunobu, MD, PhD, Department of Otolaryngology-Head and Neck Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan
takeshim0471@gmail.com

Received, May 20, 2024
Accepted, August 5, 2024