title: Prognostic significance of squamous differentiation in stage I endometrial adenocarcinoma.
abstract: The prognostic implication of benign and malignant squamous differentiation was examined in 267 consecutive patients with stage I endometrial carcinoma. Patients with adenosquamous carcinoma had a significantly poorer ten-year survival rate (54.7%) than patients with adenocarcinoma (70.5%) or adenoacanthoma (87.4%). This was related to a tendency for adenosquamous carcinoma to be associated with poorly differentiated glandular elements and to deeply invade the myometrium. The mean depth of myometrial penetration was 57% for adenosquamous carcinoma compared with 24% for adenocarcinoma and 19% for adenoacanthoma. To examine the prognostic significance of malignant squamous differentiation independently of the grade of the associated glandular component, the subgroup of patients with well-differentiated adenocarcinoma was compared. Patients with well-differentiated adenosquamous carcinoma persisted in having a worse prognosis (58.3% ten-year survival rate), compared with adenocarcinoma (84.3% ten-year survival rate), which was explained by the propensity of adenosquamous carcinoma to deeply invade the myometrium.
mesh_terms: D000206:Actuarial Analysis; D000230:Adenocarcinoma / Q000401:mortality / Q000473:pathology*; D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D013997:Time Factors; D014594:Uterine Neoplasms / Q000401:mortality / Q000473:pathology*; D014599:Uterus / Q000473:pathology*