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Rare Tumors Presenting as a Mastoid Mass
Jiyeon Lee1, Kyujin Han1, Chang-Hee Kim1
1Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul, Republic of Korea.
Case Reports in Otolaryngology
|June 23, 2020
Summary
Painless benign tumors like osteomas and lipomas rarely occur in the mastoid region. Complete surgical excision is recommended for these postauricular masses, even if asymptomatic, to prevent cosmetic deformity.
Area of Science:
- Otolaryngology
- Neurosurgery
- Pathology
Background:
- Painless, isolated mass lesions in the mastoid area are uncommon in general medical practice.
- Benign tumors of the mastoid region, particularly osteomas and lipomas, are rare occurrences.
Observation:
- Two cases of painless benign mastoid tumors in the postauricular region are presented.
- Case 1: A progressing mass behind the ear was diagnosed as an intramuscular lipoma.
- Case 2: A palpable mastoid mass was confirmed as an osteoma via biopsy.
Findings:
- Both intramuscular lipoma and osteoma were surgically removed using a postauricular approach.
- These benign tumors, though rare in the mastoid area, can present as asymptomatic or cosmetically concerning masses.
Implications:
- Complete surgical excision is advised for benign mastoid tumors, especially when symptomatic or causing cosmetic issues.
- Early diagnosis and surgical intervention can effectively manage these rare postauricular masses.
- This report highlights the importance of considering rare benign tumors in the differential diagnosis of mastoid region masses.

