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Malignant pilomatricoma.
Takashi Fujiwara1, Hiroshi Yamamoto, Makoto Hashiro
1Department of Plastic Surgery, Kansai Rosai Hospital, Amagasaki-city, Hyogo, Japan.
Summary
Malignant pilomatricoma, a rare skin tumor, was diagnosed in a retroauricular nodule. Surgical excision led to complete removal, with no recurrence observed during an 18-month follow-up period.
Area of Science:
- Dermatopathology
- Surgical Oncology
Background:
- Pilomatricoma is a benign skin appendage tumor, but malignant variants are rare.
- Malignant pilomatricoma can present as a rapidly growing nodule, often misdiagnosed initially.
Observation:
- A 47-year-old female presented with a nodular lesion in the left retroauricular region.
- The lesion was surgically enucleated for diagnostic purposes.
Findings:
- Histopathological examination confirmed the diagnosis of malignant pilomatricoma.
- Wide excision of the tumor was performed, achieving clear margins.
- No residual tumor was detected post-surgery.
Implications:
- This case highlights the importance of considering malignant pilomatricoma in the differential diagnosis of retroauricular masses.
- Complete surgical excision is crucial for successful treatment and long-term disease-free survival.
- Adjuvant therapy may be considered for advanced or metastatic disease, though not required in this case.