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Differences in age and body site distribution of the histological subtypes of basal cell carcinoma. A possible
C J McCormack1, J W Kelly, A P Dorevitch
1Dermatology Unit, Alfred Hospital, Prahran, Australia.
Objective:
To assess if there are any significant differences in the sex, anatomical site, and age distribution of patients with different histological subtypes of basal cell carcinoma (BCC).
Design:
Histopathology reports were analyzed with respect to the subtype of BCC, site of a tumor, and age and sex of a patient.
Setting:
Histopathology reports were reviewed from 1 private laboratory that derived its cases from general practitioners, surgeons, and dermatologists.
Patients:
Patients with BCC (N = 3885) for whom case data were received by the pathology laboratory from January 2, 1991, to June 12, 1991, were included in the study.
Interventions:
None.
Main Outcome Measures:
Superficial BCCs differed from other subtypes of BCC by occurring more commonly on the trunk and in younger patients.
Results:
The mean age (56.8 years) of the patients with superficial BCCs was significantly lower than that of the patients with other subtypes of BCC who were examined (P < .001); the mean ages of the patients with these other subtypes were as follows: nodulosuperficial BCC, 62.9 years; nodular BCC, 63.9 years; nodulomorpheic BCC, 66.1 years; and morpheic BCC, 66.0 years. The majority of superficial BCCs occurred on the trunk and limbs (73.3%), while the majority of all other subtypes occurred on the head and neck.
Conclusions:
Superficial BCC differs from the other subtypes of BCC in terms of patient age and tumor site, and these findings may reflect differences in the etiology.