According to von Wenczel1 the ratio of the frequency of carcinoma to sarcoma of the uterus has been placed by the authorities as 24 to 1. The site of sarcoma is generally in the corpus or fundus. For each time that sarcoma begins in the cervix there will be eight cases in which it will be found to have originated in the corpus uteri.
The uterine sarcomata spring most frequently from the mucosa—much more commonly from this structure than from the outer wall of the uterus. When a sarcoma does find its origin in the external wall, it usually originates in a degeneration of a fibromyoma, and is then of exceedingly rapid growth and commonly attains a considerable size.
Sarcomata developing in the uterine wall are most commonly of the spindle-celled variety. This form is four times as common as the round-celled sarcoma. Of the round-celled sarcomata found in
DORLAND WAN. PERITHELIAL SARCOMA OF THE UTERUS. JAMA. 1908;LI(15):1227–1229. doi:10.1001/jama.1908.25410150031001i
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