Early invasive carcinoma of the cervix (3 to 5 mm invasion): risk factors and prognosis. A Gynecologic Oncology Group study.

OBJECTIVE: Our purpose was to evaluate the risk factors and prognosis in patients with stage IA squamous cell carcinoma of the cervix and 3 to 5 mm of invasion. STUDY DESIGN: From 1981 to 1984 the Gynecologic Oncology Group conducted a prospective clinicopathologic study of patients with stage I carcinoma of the cervix. A selective study group that was previously defined and reported included patients with squamous cell carcinoma of the cervix who were treated with radical hysterectomy and pelvic lymphadenectomy and who had disease confined to the uterus, with or without microscopically positive lymph nodes. RESULTS: One hundred eighty-eight patients had invasion of 3, 4, or 5 mm as determined by central pathology review. Patients who satisfied the 3 to 5 mm invasion definition of the current stage IA2 classification of the International Federation of Gynecology and Obstetrics (1995) are the subject of this report. CONCLUSIONS: Patients with stage IA2 carcinoma of the cervix who have 3 to 5 mm of invasion present on conization with no invasion in the hysterectomy specimen are at very low risk for lymph node metastases, recurrences, or death caused by cancer.

A phase II study of intraperitoneal cisplatin and thiotepa in residual ovarian carcinoma: a Gynecologic Oncology Group study.

OBJECTIVE: Patients with advanced epithelial ovarian cancer treated with salvage therapy using new combinations of systemic chemotherapy, radiation therapy, and systemic immunotherapy have had limited success. Since the most common site of relapse or failure to conventional systemic chemotherapy has been the peritoneal cavity, intraperitoneal (IP) chemotherapy was selected to treat small-volume residual disease. METHODS: Sixty-five patients were entered on a protocol using intraperitoneal cisplatin and thiotepa following a response to intravenous cisplatin-based chemotherapy. Patients had surgically documented residual disease (0.5 cm or less maximum tumor diameter) at completion of preprotocol surgery and had no clinical, radiologic, or histologic evidence of extraperitoneal disease. Cisplatin (100 mg/m2) and thiotepa 30 mg/m2 was delivered intraperitoneally every 4 weeks for a maximum of six cycles. The dose of thiotepa was reduced to 12 mg/m2 due to unexpected severe myelosuppression. RESULTS: Of the 52 evaluable patients, grade 4 neutropenia, thrombocytopenia, neurotoxicity, and nephrotoxicity were observed in 31, 19, 13, and 6% of patients, respectively. For all evaluable patients, the complete response rate was 19% and the partial response rate was 2% for a total response rate of 21%. Of 16 patients who had a reassessment laparotomy, 10 patients achieved a surgically documented complete response and 1 patient had a partial response. Four patients are still in response for 67+, 70+, 70+, and 73+ months after third-look surgery. Three patients who did not undergo third-look surgery after chemotherapy are alive and clinically free of disease at 49+, 69+, and 85+ months. CONCLUSION: Thiotepa, when used with cisplatin for IP salvage therapy in patients with advanced or recurrent ovarian cancer, may produce significant myelosuppression and doses must be adjusted accordingly. In cisplatin-sensitive patients with small-volume residual ovarian cancer, IP cisplatin and thiotepa appears to have activity. Determining the utility of this approach will require a randomized trial.

An analysis of cell type in patients with surgically staged stage IB carcinoma of the cervix: a Gynecologic Oncology Group study.

The influence of cell type on recurrence-free interval (RFI) and survival after radical hysterectomy for patients with Stage IB carcinoma of the cervix was investigated. Patients with Stage IB carcinoma of the cervix (>3-mm invasion) underwent a radical hysterectomy and pelvic lymphadenectomy. Patients with involved paraaortic nodes or gross extracervical disease were excluded. Of 813 evaluable patients, 645 had squamous, 104 with adenocarcinoma, and 64 had adenosquamous cell type. The time to failure and the following clinical/pathologic characteristics were compared among the three cell types: age, Gynecologic Oncology Group performance status (PS), gross versus occult tumor, histologic grade, depth of invasion, node status, uterine extension, parametrial extension, surgical margins, and capillary-lymphatic space (CLS) involvement. A Cox proportional hazards model was used to compare the patients with adenosquamous and adenocarcinoma to those with squamous while adjusting for prognostic factors. The median age was 40 years (range, 21-87). Pelvic nodes were involved in 119 (15%) of patients. There were no significant differences between cell types in distributions of the following factors: age, PS, positive nodes, depth of invasion, uterine extension, surgical margins, or parametrial extension. There were statistically significant differences between cell types with regards to grade (P < 0.001), gross versus occult primary status (P = 0.016), and CLS involvement (P = 0.005). There was no statistically significant difference detected between cell types in crude comparisons of RFI (P = 0.29); however, there was a difference in survival (P = 0.02) with shorter survival seen in the adenosquamous cell type. After adjusting for CLS involvement, PS, depth of invasion, and clinical tumor size, survival remained worse for patients with adenosquamous primaries when compared to squamous carcinoma (P = 0.02) and adenocarcinoma (P = 0.007). In conclusion, no statistically significant differences were seen in RFI among cell types; however, in patients with Stage I carcinoma of the cervix overall survival after radical hysterectomy may be slightly worse for those with adenosquamous cell type.

High-dose megestrol acetate in advanced or recurrent endometrial carcinoma: a Gynecologic Oncology Group Study.

PURPOSE: Progestins represent the most widely used form of endocrine therapy in advanced or recurrent endometrial carcinoma. Based on encouraging response rates in breast cancer with high-dose megestrol acetate (MA) 800 mg/d, this phase II trial assessed response rates in patients with endometrial carcinoma treated with high-dose MA. PATIENTS AND METHODS: Sixty-three patients with recurrent or advanced endometrial carcinoma were entered into this Gynecologic Oncology Group (GOG) study. Patients had either failed to respond to or were considered incurable with local therapy and had not received prior cytotoxic or hormonal therapy. MA 800 mg/d was administered orally in divided doses. Standard GOG toxicity criteria were used. RESULTS: Of 63 patients entered, 58 were assessable for toxicity and 54 for response. Of 13 responders (24%), six (11%) had a complete and seven (13%) a partial response. Four of the responses lasted greater than 18 months. Twelve patients (22%) had stable disease. The response rate of patients with grade 1 or 2 lesions (11 of 30, 37%) was significantly higher (P = .02) than that of patients with more poorly differentiated tumors (two of 24, 8%). There was no difference in response rates comparing advanced versus recurrent disease, cell type, including papillary serous lesions, site of disease, prior radiation, age, or weight. The median progression-free survival (PFS) and overall survival intervals were 2.5 and 7.6 months, respectively. Grade 3 weight gain (> 20%) was seen in three patients and grade 3/4 hyperglycemia in three. Three deaths secondary to cardiovascular events were possibly related to therapy; diabetes was also a contributing factor in all three cases. CONCLUSION: High-dose MA is active in endometrial carcinoma, but appears to have no advantage over lower-dose progestins.

Second-look laparotomy in ovarian germ cell tumors: the gynecologic oncology group experience.

The Gynecologic Oncology Group (GOG) experience with second-look laparotomy in malignant ovarian germ cell tumors is reviewed. All patients in this study were enrolled prospectively on one of three protocols that employed relatively brief cisplatin-based chemotherapy after initial surgical staging and cyto-reduction. Forty-five surgical procedures were done in patients who received three courses of cisplatin-based adjuvant therapy after complete tumor resection. Findings were no tumor or mature teratoma in 43; 2 patients had immature teratomas. One of the latter patients received further chemotherapy and one did not. Both of these patients and 44 of the total are disease free. Seventy-two patients were treated with similar chemotherapy for advanced incompletely resected tumor. Forty-eight of these patients did not have teratoma elements in their primary tumor. At surgery, 45 patients had no tumor and 3 had persistent endodermal sinus tumor or embryonal carcinoma. All three of the latter patients are dead despite further treatment. Twenty-four patients had teratoma elements in their primary tumor. Of these patients, 16 had mature teratoma at second-look, which in 7 was bulky or progressive. Fourteen of the total 16 and 6 of the 7 with bulky residual tumor remain disease free after surgical resection. Second-look laparotomy is not necessary in patients completely resected initially or in those patients with advanced tumor that does not contain teratoma. However, enough patients with incompletely resected tumor which initially contains elements of teratoma benefit from the procedure to warrant its general use.

Prognostic factors in early-stage uterine sarcoma. A Gynecologic Oncology Group study.

BACKGROUND: A clinicopathologic evaluation of clinical Stage I and II uterine sarcoma was done by the Gynecologic Oncology Group from 1979-1988. METHODS: After all eligibility criteria were met, 453 cases were evaluable and analyzed for prognostic factors. RESULTS: Of the 301 mixed mesodermal tumors (MMT), 167 were homologous (HO), and 134 were heterologous (HE). Fifty-nine tumors were leiomyosarcomas (LM). The remaining 93 sarcomas were predominantly stromal cell and adenosarcomas. For this study, only the MMT or LM tumors were analyzed. The recurrence rate for all MMT was 53% (HO, 44%; HE, 63%). The recurrence rate for LM was 71%. The site of the first recurrence included the pelvis in 21% of MMT and 14% in LM. Factors significantly related to progression-free interval (PFI) by univariate analysis among MMT were adnexal spread, lymph node metastases, tumor size, lymphatic-vascular space involvement, histologic grade, cell type, age, peritoneal cytologic findings, and depth of uterine tumor site of invasion. The prognostic factors based on multivariate analysis were adnexal spread, lymph node metastases, histologic cell type (HO versus HE), and grade of sarcoma. For LM, the mitotic index was the only factor significantly related to PFI.

Adenosarcoma of the uterus: a Gynecologic Oncology Group clinicopathologic study of 31 cases.

We report on the clinical and pathologic findings in 31 cases of adenosarcoma of the uterus subjected to hysterectomy and staging laparotomy. Nine of 30 patients (30%) have had recurrent tumor and six of 30 (20%) have already died of tumor in a relatively short follow-up period (mean, 38.3 months). Seventeen of 31 cases were diagnosed as adenosarcoma with sarcomatous overgrowth (SO). Ten of these 17 with SO contained focal or extensive rhabdomyosarcoma. In six cases, extrauterine spread was identified as follows (two patients had two sites each): vaginal involvement (two cases), pelvic lymph node metastases (two), positive peritoneal cytologic findings (two), parametrial invasion (one), and ovarian metastasis (one). Extrauterine spread (stage III) (p less than 0.001) and myometrial invasion (p = 0.04) were associated with higher rates of recurrence. The presence of lymphatic and/or vascular invasion, SO, and rhabdomyosarcomatous differentiation also indicated poor prognosis but did not attain statistical significance. Based on this experience, staging laparotomy including peritoneal cytology is suggested in cases of clinical stages I and II adenosarcoma. The differential diagnosis of these tumors is also discussed.

Ovarian metastases in stage IB carcinoma of the cervix: a Gynecologic Oncology Group study.

Surgical and pathologic findings at laparotomy for radical hysterectomy in 990 patients with clinical stage IB carcinoma of the cervix were analyzed to determine the frequency of metastases to the ovary. Ovarian spread was identified in 4 of 770 (0.5%) patients with squamous carcinoma and 2 of 121 (1.7%) with adenocarcinoma. No patients with adenosquamous carcinoma (n = 82) or other histologic types (n = 17) had ovarian metastases. Although the frequency of metastases was greater among patients with adenocarcinoma, this was not statistically significant (p = 0.19, Fisher's exact test). All 6 patients with ovarian metastases had other evidence of extracervical disease. Three underwent radical hysterectomy and bilateral salpingo-oophorectomy. Of these, one patient received extended field radiotherapy and died of disease 18 months after diagnosis. Two patients, one treated with combination chemotherapy and one with no adjunctive therapy, are alive without evidence of disease at 59 and 62 months, respectively. Three patients underwent exploratory laparotomy with salpingo-oophorectomy and lymphadenectomy without hysterectomy. All three patients died of disease at 2, 3, and 30 months; the first and last patient received adjunctive radiotherapy. Not all patients underwent oophorectomy. Of 347 patients with at least unilateral ovarian preservation, no postoperative pelvic radiotherapy, and no gross extracervical disease or metastasis to the paraaortic nodes, pelvic recurrence developed in 16. There was no excess of pelvic recurrences in patients with adenocarcinoma (0/41) or adenosquamous carcinoma (1/29, 3.4%) when compared with those with squamous carcinoma (15/270, 5.6%). This suggests no excess of occult ovarian metastases in nonsquamous tumors of the cervix. There is no evidence in these data of an increased risk of ovarian preservation in patients with stage IB carcinoma of the cervix with no gross extracervical disease.

Long-term follow-up and prognostic factor analysis in advanced ovarian carcinoma: the Gynecologic Oncology Group experience.

Long-term follow-up was obtained on 726 women with advanced ovarian carcinoma (suboptimal stage III and stage IV) who had received primary chemotherapy on two Gynecologic Oncology Group (GOG) protocols between 1976 and 1982. The first study compared melphalan alone versus melphalan plus hexamethylmelamine versus cyclophosphamide plus doxorubicin (CA). The second study evaluated the same CA regimen with or without cisplatin. Eligibility for the two studies was the same. At last contact, 76 patients were alive. In a multivariate analysis, cell type other than clear cell or mucinous, cisplatin-based treatment, good performance status, younger age, lower stage, clinically nonmeasurable disease, smaller residual tumor volume, and absence of ascites were favorable characteristics for overall survival (P less than .05). Second-look laparotomy was negative significantly more often among those with endometrioid tumors; there were no negative second-look laparotomies among those with mucinous or clear cell tumors. There were 30 patients with suboptimal stage III disease who had a negative second-look laparotomy; 18 (60%) have experienced recurrence, and 13 (43%) have died. Although cisplatin treatment was beneficial, new treatments are clearly needed.

Rapid escalation of weekly intramuscular methotrexate for nonmetastatic gestational trophoblastic disease: a Gynecologic Oncology Group study.

Patients with postmolar nonmetastatic gestational trophoblastic disease were entered into this Gynecologic Oncology Group study to determine the relationship of efficacy and toxicity to a rapidly escalating dose of weekly intramuscular methotrexate. The treatment was initiated at 40 mg/m2 weekly of intramuscular methotrexate. If no major toxicity was encountered, the weekly dose was escalated 5 mg/m2 at 2-week intervals until a maximum dose of 50 mg/m2 per week was achieved. Complete response was defined as three normal beta-hCG values measured on consecutive weeks. Forty-six of sixty-two (74%) evaluable patients had a complete response to this regimen. Duration of therapy ranged from 3 to 16 weeks with a median of 7 weeks. No major toxicity occurred. Eight patients experienced leukopenia at a median of 3200/microliters (range 2100-3900). Two patients had platelet nadirs of 128,500 and 131,000. Only 50% (8/16) of the nonresponders subsequently responded to second-line 5-day methotrexate every 2 weeks. Fifteen of the sixteen weekly intramuscular methotrexate failures ultimately had complete responses after treatment with subsequent chemotherapy. In this study, second-line therapy results support administration of another agent such as dactinomycin rather than 5-day methotrexate. This higher dose (1.36 relative dose intensity to median complete response) of weekly intramuscular methotrexate therapy (40 mg/m2) is no more effective and of similar toxicity to a lower-dose regimen (30 mg/m2) reported earlier.

Carcinosarcoma (malignant mixed mesodermal tumor) of the uterus. A Gynecologic Oncology Group pathologic study of 203 cases.

We report on the pathologic findings in primary tumors and metastases in 203 cases of stage I and II endometrial carcinosarcoma (malignant mixed mesodermal tumor) subjected to hysterectomy and staging laparotomy. Metastases were studied in 40 of these cases, including 34 with positive findings in the pelvic and/or para-aortic lymph nodes. Features of the stromal component of the primary tumors, including grade, mitotic index, and the presence and types of heterologous elements, showed no relation to the presence of metastases at operation. High-grade, serous, and clear cell carcinomatous components, on the other hand, were associated with a higher frequency of metastases, as were deep myometrial invasion, lymphatic or vascular space invasion, and involvement of the isthmus or cervix. The current concepts of histogenesis and differentiation of these tumors are discussed, and the suggestion is made that they might represent metaplastic carcinomas.

Weekly intramuscular methotrexate for nonmetastatic gestational trophoblastic disease.

Patients with nonmetastatic gestational trophoblastic disease were entered into this Gynecologic Oncology Group study to determine the efficacy, toxicity, and cost-effectiveness of weekly intramuscular (IM) methotrexate. Treatment was initiated with 30 mg/m2 of weekly IM methotrexate. If no major toxicity was encountered, the weekly dose was escalated 5 mg/m2 at three-week intervals until a maximum dose of 50 mg/m2 each week was achieved. Complete response was defined as three normal beta-hCG values measured on consecutive weeks. Fifty-one of 63 evaluable patients (81%) had a complete response to weekly IM methotrexate. Duration of therapy ranged from three to 19 weeks, with a median of seven. No major toxicity occurred. Thirteen patients experienced leukopenia at a median of 3300/microL, with a range of 2300-3900. Three patients had platelet nadirs of 66,000, 127,000, and 135,000/microL. Eleven patients with weekly IM methotrexate failure had a complete response after one to eight courses of dactinomycin administered 0.5 mg/m2 intravenously daily for five days; one refused therapy after three courses. Weekly IM methotrexate for nonmetastatic gestational trophoblastic disease is efficacious, minimally toxic, and cost-effective.

Observations on the use of adjuvant radiation therapy in patients with stage I and II uterine sarcoma.

From November 1973 through July 1982, 225 women with Stage I or II uterine sarcoma were entered on a protocol which evaluated the use of doxorubicin in the adjuvant setting. Of these, 157 patients had a minimum follow-up of 2 years. Following complete surgical removal of all known clinical disease, consenting patients were randomized to receive either 60 mg/m2 of doxorubicin every 3 weeks for eight courses or no further therapy. The use of radiation therapy in this protocol was optional, and a review of protocol cases was undertaken to determine progression-free interval, survival rates, and site of first recurrence in the radiation therapy and no radiation therapy groups. In patients with Stage I or II leiomyosarcoma of the uterus, there was no difference in the progression-free interval, absolute two-year survival rate, or site of first recurrence in the two groups. There was no difference in the progression-free interval or absolute survival rates for cases with Stage I and II uterine mixed mesodermal sarcomas in the two treatment groups. However, those who received radiation therapy to the pelvis experienced a statistically significant reduction of recurrences within the radiation treatment field.

Human papillomavirus deoxyribonucleic acid in adenocarcinoma and adenosquamous carcinoma of the uterine cervix.

This report describes the detection of human papillomavirus type 16 or 18 deoxyribonucleic acid (DNA) in nine of 15 invasive tumors of the cervix, including three squamous carcinomas, four adenosquamous carcinomas, one glassy cell carcinoma, and one adenocarcinoma. The viral DNA was identified by Southern blotting and DNA hybridization. Human papillomaviruses may play an etiologic role in the development of at least some adenocarcinomas and adenosquamous carcinomas as well as most squamous tumors of the cervix.

Randomized trial of three cisplatin dose schedules in squamous-cell carcinoma of the cervix: a Gynecologic Oncology Group study.

The Gynecologic Oncology Group has conducted a randomized prospective trial comparing cisplatin 50 mg/m2 every 21 days (regimen 1), 100 mg/m2 every 21 days (regimen 2), and cisplatin 20 mg/m2 for five consecutive days repeated every 21 days (regimen 3). Four hundred ninety-seven evaluable patients have been accrued on this study. The response rates were 20.7%, 31.4%, and 25.0%, for regimens 1, 2, and 3, respectively; the complete remission rates were 10.0%, 12.7%, and 8.6% for regimens 1, 2, and 3, respectively. The median duration of response ranged from 3.9 to 4.8 months, the median progression-free interval from 3.7 to 4.6 months, and the median survival time from 6.1 to 7.1 months. The difference in response rates for regimens 1 and 2 is statistically significant (P = .015) but less than the magnitude originally considered clinically significant. The differences in complete remission rates, response duration, progression-free interval, and survival times are not statistically significant. The following types of toxicity were observed: serum creatinine level greater than 2 mg/dL and/or BUN level greater than 40 mg/dL was 7%, 14%, and 17% on regimens 1, 2, and 3, respectively; leukocyte count less than 4,000/microL was 27%, 44%, and 41% on regimens 1, 2, and 3, respectively. Nausea and vomiting occurred in 74 patients (83%). The regimen consisting of a 100-mg/m2 single dose has produced a statistically significant higher response rate than the 50 mg/m2 regimen while producing no appreciable differences in complete remission rate, response duration, progression-free interval, or survival. In addition, the higher dose regimen was associated with greater myelosuppression and nephrotoxicity.

A randomized study of adriamycin with and without dimethyl triazenoimidazole carboxamide in advanced uterine sarcomas.

Various drug combinations including Adriamycin have been tested in soft tissue sarcomas, but optimal treatment remains unclear. We have evaluated Adriamycin with and without dimethyl-triazeno-imidazole-carboxamide (DTIC) in the treatment of Stage III or IV and recurrent sarcomas of the uterus. Two hundred and forty cases of these rare tumors were evaluable. Of 146 evaluable patients with measurable disease, 13/80 (16.3%) of Adriamycin-treated patients and 16/66 (24.2%) of patients receiving the combination showed an objective response (P greater than 0.05). Lung metastases responded more frequently (P equal to 0.04) to combination therapy, but there was no survival advantage. For patients with nonmeasurable disease the progression-free interval was similar (10.0 months for Adriamycin and 8.0 months for the combination). Leiomyosarcomas had a significantly longer survival than other cell types (12.1 versus 6.0 months, P less than 0.001) but there was no advantage for either regimen. There was a suggestion that heterologous mixed mesodermal sarcomas were more responsive to the combination (27.3 versus 8.7%). The addition of DTIC produced significantly more hematologic and gastrointestinal toxicity. Other Adriamycin combinations should be evaluated in uterine sarcomas.

Advanced ovarian carcinoma: response to antiestrogen therapy.

Three patients with Stage III serous cystadenocarcinoma of the ovary were successfully treated with estrogen antagonist therapy after failure of cytotoxic chemotherapy. All had histologic confirmation of progressive or persistent disease. High titers of estrogen receptor protein (ERP) and progesterone receptor protein (PRP) were detected in one patient prior to tamoxifen therapy. One patient had a complete remission lasting for 18 months. The other patients had partial responses and were able to return to normal activities. Simultaneous or prior sequential cytotoxic chemotherapy did not negate the effectiveness of the estrogen antagonists.

Primary carcinoma of the fallopian tube.

The present report of 16 new cases of fallopian tube carcinoma also includes 2 new cases of adenoacanthoma, an exceedingly rare tumor. The histologic evaluation of tubal carcinoma is discussed. A meticulous search at surgery for occult disease is urged, because penetration of the tubal serosa seems to be the most important determinant of prognosis. Suggestions are made for adjunctive therapy, although the authors believe the time has come for a multicentered attempt to evaluate treatment protocols randomly.

Immature teratoma of the ovary with a neural component ("solid" teratoma). A clinicopathologic study of 20 cases.

Twenty cases of immature teratoma of the ovary with a neural component are analyzed. A plea is made for use of the nomenclature adopted from the new World Health Organization classification of ovarian tumors, the past confusion over terminology and histogenesis of this rare tumor is discussed. All the primary tumors in the present series contained at least some immature tissues (predominantly of neural origin) and were thus graded from 1 to 3 according to the criteria of Thurlbeck and Scully. No grade 0 tumors ("benign solid teratomas") were identified. We believe that thorough sectioning almost always insures the identification of immature elements. The prognosis was closely related to the histologic grade, but correlated poorly withthe clinical stage, the latter being influenced by the common finding (25 per cent of the cases in this series) of peritoneal implants composed exclusively of mature glial tissue, which is associated with a benign clinical evolution. This phenomenon of maturation or differentiation appears to be the rule rather than the exception in this tumor, since implants are usually of better or equal differentiation when compared with their primary tumors and older patients tend to have lower grade tumors than younger patients. Since the majority of patients with this tumor are young, primary surgical therapy should be conservative, unilateral salpingooophorectomy often being sufficient. Spontaneous or operative rupture of the tumor capsule carries an increased risk of subsequent dissemination. We have noted impressive clinical responses in patients with disseminated tumors of a high histologic grade after treatment with triple chemotherapy (vincristine, actinomycin D, and cyclophosphamide) but do not recommend adjuvant therapy in patients with only grade 0 implants.

Management of immature teratoma of the ovary in children by conservative resection and chemotherapy.

Six patients with immature teratoma of the ovary were treated with surgery and chemotherapy. Surgical management consisted of unilateral salpingo-oophorectomy, biopsy and conservation of the contralateral ovary, and biopsy of peritoneal implants. Triple-agent chemotherapy with vincristine, actinomycin D, and cyclophosphamide was given to four patients and appeared to be beneficial. Radiation therapy was not employed. Local resection of teratomatous recurrences was frequently necessary. Thorough sampling of this tumor is mandatory for establishment of an exact pathologic diagnosis. All six patients are surviving in good health at 1-8-yr follow-up. The prognosis of immature teratoma in the child or adolescent appears more favorable than previously appreciated.