Table 1.
Characteristics associated with squamous cell carcinoma (SCC) complicating hidradenitis suppurativa (HS)
| Characteristic | N | Value |
|---|---|---|
| Average age, years (range) | 73 | 52·4 (27·0–78·0) |
| Gender | 74 | 86·5% male |
| Tobacco use status | 15 | 80·0% reported use |
| Duration of HS prior to SCC, years (range) | 69 | 25·5 (3·0–51·0) |
| Location of SCC* | 80 | |
| Perianal/perineal | 33 | 41·3% |
| Buttock/gluteal | 43 | 53·8% |
| Thigh | 5 | 6·3% |
| Groin/inguinal | 3 | 3·8% |
| Male external genitalia | 3 | 3·8% |
| Female external genitalia | 4 | 5·0% |
| Sacrum | 3 | 3·8% |
| Scapula | 1 | 1·3% |
| Histological differentiation | 58 | |
| Verrucous carcinoma | 9 | 15·5% |
| Well‐differentiated | 31 | 53·4% |
| Moderately differentiated | 12 | 20·7% |
| Poorly differentiated | 6 | 10·3% |
| Alpha‐HPV strain | 11 | 72·7% positive |
| Beta‐HPV strain | 8 | 87·5% positive |
| Evaluation for metastasis | 58 | 55·1% confirmed metastasis |
| Vital status | 71 | 53·5% confirmed dead |
HPV, human papilloma virus.
*
Percentages do not add up to 100% as SCC may involve more than one location.