Related Experiment Video
Updated: Aug 7, 2026

05:39
Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus
Published on: May 16, 2025
[Diagnostic image (276). A man with a bizarre cutaneous abnormality]
1Máxima Medisch Centrum, afd Chirurgie, Veldhoven. m.aldenzee@mmc.nl
Nederlands Tijdschrift Voor Geneeskunde
|June 14, 2006
Summary
A cutaneous horn on the knee was found to be caused by squamous cell carcinoma in a 72-year-old male. This case highlights the importance of evaluating such lesions for underlying malignancy.
Area of Science:
- Dermatology
- Oncology
Background:
- Cutaneous horns are clinical presentations, not specific diagnoses.
- Squamous cell carcinoma (SCC) is a common skin cancer that can arise from various precursor lesions.
Observation:
- A 72-year-old male patient presented with a cutaneous horn located on the posterior aspect of his left knee.
- The lesion exhibited typical features of a cutaneous horn, a conical projection of keratin.
Findings:
- Histopathological examination of the cutaneous horn revealed it to be a manifestation of invasive squamous cell carcinoma.
- The underlying cause of the cutaneous horn was confirmed as squamous cell carcinoma.
Implications:
- This case underscores the necessity of biopsy for all cutaneous horns to rule out or confirm malignancy.
- Early detection and treatment of squamous cell carcinoma arising in this location are crucial for patient outcomes.