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Neurofibromatosis type 2 initially presenting as a preauricular mass: a case report
Wei-Che Lan1,2, Yu Aoh3, Rui-Yun Chen4
1Department of Otolaryngology Head and Neck Surgery, China Medical University Hospital, No.2, Yude Rd., North Dist., Taichung City, 404, Taiwan, Republic of China.
Summary
Neurofibromatosis type 2 (NF2) can manifest initially as a solitary skin tumor. Early diagnosis is crucial, even without other typical symptoms, for comprehensive NF2 assessment.
Area of Science:
- Genetics
- Neurology
- Oncology
Background:
- Neurofibromatosis type 2 (NF2) is a rare genetic disorder characterized by tumors in the central and peripheral nervous systems.
- Typical NF2 manifestations include bilateral vestibular schwannomas and associated auditory or balance issues.
- Cutaneous involvement can occur but is less common than neurological symptoms.
Observation:
- A case study of a 20-year-old male presenting with a solitary, painless subcutaneous nodule in the preauricular area.
- Pathological diagnosis of the nodule confirmed it as a schwannoma.
- Subsequent MRI revealed extensive, multiple mass lesions characteristic of NF2 throughout the central and peripheral nervous systems.
Findings:
- The patient was diagnosed with NF2 based on clinical criteria, despite the initial isolated presentation.
- The case highlights that NF2 can present initially with a peripheral schwannoma without other overt clinical findings.
- This presentation underscores the diagnostic challenge of NF2 in atypical cases.
Implications:
- Young patients with peripheral schwannomas warrant thorough investigation for NF2, even in the absence of other symptoms.
- Early identification of NF2 enables timely management, such as radiosurgery for vestibular schwannomas.
- This case broadens the understanding of NF2's diverse clinical presentations.
