Superficial Basal Cell Carcinoma: a comparison of Superficial only Subtype with Superficial combined with other Subtypes by Age, Sex and Anatomic Site in 3,150 cases

Abstract

BACKGROUND

Basal Cell Carcinoma (BCC) may present as superficial subtype alone (sBCC) or superficial combined with other subtypes.

OBJECTIVE

To compare sBCC without or with other BCC subtypes by age, sex and anatomic site.

METHODS

We retrospectively collected superficial BCC with the above characteristics from an Australian centre during 2009–14.

RESULTS

We recorded 1,528 sBCC and 1,622 superficial BCC combined with other BCC subtype cases. Males numbered 2,007 and females 1,140. On males, head sites (forehead, cheek, nose and ear combined) compared to limb plus trunk sites displayed a higher incidence of superficial BCC combined with either nodular and or aggressive BCC subtypes (OR 13.15 CI 95% 8.9-19.5 p < 0.0001). On females a similar comparison also found a higher incidence of superficial BCC combined with solid subtype BCC on head sites compared to trunk and limb sites (OR 9.66 CI 95% 5.8-16.1 p < 0.0001).

CONCLUSION

Superficial BCC alone is more likely on younger females on trunk and limb sites. Small partial biopsies reported as sBCC may miss other BCC subtypes present with higher risk on facial sites for males and females. Males had smaller proportions of superficial only subtype BCC on facial and ear sites compared to females.

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