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Acquired cutaneous smooth muscle hamartoma
T N Darling1, H Kamino, J C Murray
1Department of Medicine, Duke University Medical Center, Durham, North Carolina.
Journal of the American Academy of Dermatology
|May 1, 1993
Summary
This case study describes a rare acquired smooth muscle hamartoma on the neck. Unlike typical cases, this instance was not associated with Becker nevus, highlighting diagnostic variations.
Area of Science:
- Dermatology
- Pathology
- Histopathology
Background:
- Acquired smooth muscle hamartomas are rare benign skin neoplasms.
- These hamartomas typically present as congenital or early-onset lesions.
- Association with Becker nevus is a common, but not universal, feature.
Observation:
- A 35-year-old man presented with a 10-year history of an indurated, indistinct plaque on the anterior neck.
- The lesion was asymptomatic and slowly evolving.
- No other cutaneous or systemic abnormalities were noted.
Findings:
- Dermal biopsy revealed a proliferation of smooth muscle bundles.
- The smooth muscle was diffusely distributed within the dermis.
- Histopathological findings were consistent with acquired smooth muscle hamartoma.
Implications:
- This case expands the clinical spectrum of acquired smooth muscle hamartomas.
- It underscores the importance of histopathological examination for diagnosis.
- The absence of Becker nevus association suggests alternative or independent etiologies may exist.