Rat pups that were exposed to a novel anise odor paired with tactile stimulation (stroking the skin with a paint brush) received injections of either saline or the dopamine D1 receptor antagonist (+/-)-SKF 83566 (0.1 mg/kg) before conditioning or immediately after conditioning. Animals that received the drug either before or after training showed less approach to the conditioned odor during the testing period 24 hr later than did animals that received the vehicle. Posttraining administration of the D2 receptor antagonist spiperone (0.1 mg/kg) did not affect subsequent approach to the conditioned odor, suggesting a selective effect of D1 receptor blockade. The impairment in learning by the administration of (+/-)-SKF 83566 before conditioning was reversed by the injection of the dopamine receptor agonist apomorphine (0.1 mg/kg) immediately after conditioning. Posttraining D1 receptor activation appears necessary for normal odor conditioning in rat pups.

A retrospective analysis of the clinico-pathologic aspects of 22 cases of clear cell ovarian carcinoma with a literature survey is the subject of this report. The rarity of these neoplasms below the age of 40 is reaffirmed. Tumor-related hypercalcemia was observed in two patients and postoperative thromboembolic complications were encountered in three others. Electron microscopic examination revealed abundant cytoplasmic glycogen content in two cases. Ten patients in this group and 26% in reported series had coexistent endometriosis. Association with endometrial carcinoma was observed in two patients and was reported in 14% of the cases. No patient of ours with Stage III or IV disease survived 5 years or longer and only 8% have reportedly survived in collective series. There was suggestive evidence of radiation tumor response in two patients with Stage IIC disease who had received 5,000 rads pelvic radiotherapy. Objective partial responses were also observed with adriamycin-, cytoxan-, and cis-platinum-containing combinations. A management plan is outlined.

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