Objective. Angiogenesis has been shown to correlate positively with the pre
sence of metastatic disease in some tumors, but has not been studied in inv
asive vulvar squamous cell carcinoma. Fifty cases of invasive vulvar squamo
us cell carcinoma were studied in an effort to correlate angiogenesis with
stage, survival, and pattern of invasion.
Methods. These patients were diagnosed between 1987 and 1993. Microvessels
were identified immunohistochemically using antibody to Factor VIII, and ar
eas of greatest microvessel density associated with tumor were counted. The
pattern of invasion was categorized as "spray," "pushing," or "mixed." The
mean microvessel count was correlated with surgical and clinical stage, pa
ttern of invasion, and survival.
Results. Mean microvessel counts in surgical stage I/II cases (31.1 +/- 7.3
) were not significantly different from stage III/IV cases (26.3 +/- 8.6) (
P = 0.089). Similarly mean microvessel counts in clinical stage I/II cases
(31.6 +/- 11.9) were not significantly different from stage III/IV cases (2
7.0 +/- 8.7) (P = 0.198). Seventeen patients who died of disease had mean c
ounts of 26.1 +/- 6.4, while 21 patients alive with or without evidence of
disease had counts of 31.1 +/- 10.8 (P = 0.087). Mean microvessel counts di
d not vary significantly with the spray pattern (30.1 +/- 8.7), pushing pat
tern (31.4 +/- 12.9), or mixed pattern of invasion (31.4 a 12.9) (P = 0.920
).
Conclusions. Tumor angiogenesis in vulvar squamous cell carcinoma does not
correlate positively with stage, survival, or pattern of invasion and canno
t be used as a prognostic indicator. (C) 1999 Academic Press.