Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
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Question: Abstract: A carotid-cavernous fistula recurred 16 years after a Hamby procedure. The recurrence was manifested by subarachnoid hemorrhage originating from dilated draining pial veins. The fistula was closed with a balloon catheter introduced through a patent remnant of the cervical carotid artery. Patients who have previously undergone Hamby trapping and embolization should be reassessed for an occult fistula that could predispose them to intracranial bleeding.
Which is the apt title for the abstract? option1: Balloon occlusion of a recurrent carotid-cavernous fistula previously treated by carotid ligations. option2: Results and implications of the Hypertension Detection and Follow-up Program.

Answer: Balloon occlusion of a recurrent carotid-cavernous fistula previously treated by carotid ligations.

Question: Abstract: In a series of 715 patients operated on by microsurgical techniques for intracranial saccular aneurysms between 1970 and 1980, part of the aneurysmal sac was not obliterated in 28 aneurysms in 27 patients (3.8% of 715 cases). Clinical follow-up evaluation for 8 years (range 4 to 13 years) and angiographic follow-up studies for 6 years (range 2 to 10 years) in these 27 cases revealed that one aneurysm rest increased in size and bled twice, five were spontaneously obliterated, two decreased in size, 13 remained unchanged, and in seven cases no late follow-up angiography was performed. The incidence of rebleeding from an aneurysm rest was 3.7% of the 27 in whom the sac was not obliterated and 0.14% of all 715 patients who were operated on.
Which is the apt title for the abstract? option1: Natural history of postoperative aneurysm rests. option2: Neutropenia and fever in patients undergoing combination chemotherapy for malignant germ cell tumors of the ovary.

Answer: Natural history of postoperative aneurysm rests.

Question: Abstract: The effects of preoperative irradiation on the morphology of transitional cell carcinomas (TCCs) were evaluated by studying the pretreatment biopsy and radical cystectomy specimens from 35 patients. Twenty-six of these patients had received 2000 rad within the week preceding surgery, and nine patients had received no preoperative treatment. The frequency of bladders without residual TCC was 23% for irradiated and 22% for nonirradiated cases. Of the TCCs classified as papillary in the biopsy specimens and irradiated, 79% lacked a papillary component at cystectomy, but in no case was the invasive component eliminated or regression from muscle invasion to superficial TCC noticed. Flat carcinoma in situ (CIS) did not respond to irradiation. At cystectomy nuclear pleomorphism was greater than at biopsy in 60% of the irradiated TCCs, whereas all nonirradiated cases retained the same grade as at biopsy. In addition, irradiation induced squamous differentiation in neoplastic cells only, without affecting the nonneoplastic urothelium.
Which is the apt title for the abstract? option1: Transitional cell carcinomas of the urinary bladder. Effects of preoperative irradiation on morphology. option2: Gastrointestinal endoscopy in octagenarians.

Answer:
Transitional cell carcinomas of the urinary bladder. Effects of preoperative irradiation on morphology.