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Intramuscular lipoma within the temporal muscle
1Department of Dermatology, Hashima City Hospital, Hashima and Gifu University School of Medicine, Gifu, Japan. masanoriban@k5.dion.ne.jp
International Journal of Dermatology
|October 23, 2002
Summary
A patient with a forehead nodule and headache was diagnosed with an intramuscular lipoma. Surgical resection of the benign adipose tumor resolved the headache, with no recurrence observed.
Area of Science:
- Neurosurgery
- Dermatology
- Pathology
Background:
- A 61-year-old male presented with a growing forehead nodule and ipsilateral headache.
- Initial clinical suspicion was a pseudoaneurysm of the superficial temporal artery due to nodule proximity and arterial pulsation.
Observation:
- A 15x15 mm subcutaneous nodule was noted on the left forehead, adjacent to the superficial temporal artery.
- The nodule lacked pulsation and tenderness, despite the artery's strong pulsation.
- Headache was localized to the left temporal area.
Findings:
- Histopathology revealed a benign intramuscular lipoma composed of mature adipose cells within the temporal muscle.
- The tumor exhibited mature adipose cells without nuclear pleomorphism or mitoses, embedded in muscular fibers with partial fibrosis.
Implications:
- Intramuscular lipoma should be considered in the differential diagnosis of forehead nodules, even when adjacent to pulsatile arteries.
- Surgical resection of intramuscular lipoma can lead to symptom resolution, as seen with the patient's headache.
- This case highlights the importance of histopathological examination for accurate diagnosis of soft tissue tumors.