{'fraction_non_alphanumeric': 0.018867924528301886, 'fraction_numerical': 0.008254716981132075, 'mean_word_length': 4.895833333333333, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Yolk sac tumors of the ovary

Eighteen instances of ovarian tumor with microscopic pattern similar to that of the testicular tumors which we termed yolk sac or vitelline are presented. In the ovary, though not in the testis, this pattern has often been called “Schiller mesonephroma.” Reasons are given for our preference for the term yolk sac tumor to that of mesonephroma for these neoplasms. The ovarian tumors, though occurring in young individuals, unlike the testicular tumors are not concentrated in early infancy. Moreover, the ovarian tumors do not exhibit the striking age‐prognosis relationship which characterized the testicular tumors. Two of the 18 subjects with ovarian tumors appear to have survived their neoplasms; one of these was 7 and the other 15 at the time of surgery. The remaining 16 subjects have died of their neoplasms.