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Biomedical subjects

J G Fortner

Publications and source records attributed to J G Fortner.

At least 145 records · Page 8Linked to original sources

Effectiveness of prostaglandin E1 and procarbazine hydrochloride in prolonging the survival of vascularized cardiac hamster-to-rat xenograft.

The immunosuppressive effects of prostaglandin E1 and procarbazine hydrochloride were compared in a vascularized organ xenograft model. Hamster-to-rat cardiac grafts were used. Both procarbazine hydrochloride and prostaglandin E1 prolonged survival of the xenograft. Prostaglandin E1 had the additional feature of coincident suppression of hemagglutination titer to hamster red cells. Prostaglandin E1 was somewhat less effective than procarbazine hydrochloride.

Animals↗

Spntaneous perforation of the gastrointestinal tract in patients with cancer.

The mortality of spontaneous gastrointestinal perforation in 36 patients with cancer was 84% (30 patients). The main factors responsible for this included failure of recognition, perforation through tumor, advanced uncontrolled disease and multiple organ failure. Six of 19 patients who underwent surgery survived (32%). Five of these patients did not perforate through tumor and their underlying malignancy was in good control. Earlier diagnosis is essential. Prompt surgical intervention and intensive supportive measures are indicated only if additional therapy of the underlying malignancy offers a reasonable chance for continued worthwhile palliation.

Adolescent↗

Tumors of the liver as demonstrated by angiography, scan and laparotomy.

One hundred and eighteen patients with various hepatic tumors proved by laparotomy have been analyzed for accuracy and for pitfalls of preoperative studies, namely, physical examination, celiac and superior mesenteric angiography and liver scan. Angiography is correct in detecting a hepatic tumor in 93 per cent and scan, in 87 per cent, overall. When angiography and scan are combined, tumors are detected in 97 per cent of patients. As for specific location and extent of the hepatic tumor to determine its resectability, angiography is correct in 75 and scan in 62 per cent, over-all. Eleven of 39 resectable tumors were deemed nonresectable in preoperative studies. Although angiography and scan are the best available means of diagnosing hepatic tumors, presently, true resectabilty of hepatic tumors can be determined only be exploratory examination.

Angiography↗

Endoscopic diagnosis of advanced gastric cancer. Factors influencing yield.

Factors influencing diagnostic yield by directed endoscopic biopsy and cytology were studied in 50 patients with advanced gastric cancer using a forward-viewing panendoscope. The diagnostic yield was higher for exophytic lesions than for infiltrative tumor, and directed brush cytology alone was more productive than directed biopsy alone. The lesions that provided non-diagnostic tissue were mostly recurrent or infiltrative cancers, and were most often in the cardia, antrum, or were of the linitis plastica type. The combination of infiltrative character and location in antrum or cardia, especially if recurrent, often resulted in non-diagnostic biopsy and cytology specimens.

Biopsy↗

Current management of hepatic tumors.

Today, the presence of a hepatic tumor can be diagnosed with considerable accuracy by means of isotope scans, arteriogram and ultrasonic imaging. Its localization to one lobe or other lobes is also generally achievable but with less accuracy because it is not yet possible to visualize the interlobar fissure by a noninvasive technique. Exploratory laparotomy with a view to resection is the preferred approach if the patient is in good general condition. Percutaneous biopsy of a hepatic lesion should be avoided unless laparotomy is not contemplated. Resection is the mainstay of therapy for all forms of hepatic malignant tumors and is the only modality that gives some prospect of cure. The prohibitively high operative mortality rate of former years, mostly due to hemorrhage, has gradually decreased with improved understanding of hepatic anatomy and innovations in surgical technique. By means of adequate vascular control and, if necessary, parenchymal cold perfusion, major resections of difficult and bulky lesions can now be accomplished with safety. Systemic chemotherapy with single agents, intra-arterial infusion chemotherapy and hepatic dearterialization have each been found to be of modest therapeutic value in a variable proportion of patients with diffuse unresectable cancer of the liver. The results of current experience indicate that the response rate is not high and long term control of tumor is rare. Multiple drug combinations with or without infusion therapy or dearterialization are being tried in many centers. Therapeutic strategy and end results for the different forms of benign and malignant neoplasms of the liver are discussed.

Angiography↗

Major hepatic resection using vascular isolation and hypothermic perfusion.

The technique and results of 29 major hepatic resections using the method of complete vascular isolation and hypothermic perfusion of the liver are reported. The method enables the surgeon to perform otherwise difficult or impossible resections through chilled bloodless hepatic parenchyma. Major intrahepatic vascular structures can thus be recognized and controlled readily under clear vision. Direct neoplastic involvement of, or tumor thrombi in the portal vein, hepatic vein or vena cava, can be successfully dealt with by appropriate surgical measures. The operative mortality was 10.3% for this series which included many tumors previously deemed unresectable. The technical detail and intraoperative physiologic monitoring crucial to success in the use of the method are described. It is hoped that with the widened scope of resectability afforded by this technique, and the use of adjuvant chemotherapy, the currently experienced low cure rates for hepatic cancer can be improved.

Cyclophosphamide↗