TASK DEFINITION: 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).
PROBLEM: Abstract: Preoperative evaluation of parotid tumors still poses difficult problems for the head and neck surgeon. The complex anatomy of the parotid space leads to difficulty in localizing these tumors. In addition, physical examination will rarely determine whether a parotid lesion is benign or malignant. High resolution CT scanning with contrast and fine needle aspiration can provide enough preoperative information to enable the surgeon to counsel his patient concerning possible risks and the extent of surgery that may be indicated. We are able to determine tumor location, multiple or bilateral masses, associated adenopathy, and often specific tumor histology. Forty-two parotid aspirates and 26 CT scans were reviewed and correlated with their postoperative pathology specimen. Parotid aspiration cytology was found to be a highly accurate and safe procedure for preoperative determination of parotid pathology. However, the CT scan was specific only in defining the anatomic localization and extent of a parotid mass.
Which is the apt title for the abstract? option1: Correlation of fine needle aspiration biopsy and CT scanning of parotid masses. option2: An algorithmic approach to the diagnosis and staging of renal neoplasms.

SOLUTION: Correlation of fine needle aspiration biopsy and CT scanning of parotid masses.

PROBLEM: Abstract: Off-road vehicles have attained growing popularity, expanding markets and increasing rates of associated injury, especially among young people. In 1984-85, 148 patients were treated at the Children's Hospital of Eastern Ontario, Ottawa, for injuries suffered in off-road vehicle accidents. The average age of the patients was 14 years. Soft-tissue injuries occurred in 33 patients, 21 of whom had severe injuries. There were 179 fractures in 133 patients. One patient died as a result of his injuries. The most common mechanism of injury was losing control of and tumbling from the machine. Seventeen patients were struck by their own vehicles, and 39 collided with objects such as cars, trees or people. The health care costs of these accidents are no less serious than the concerns for the appropriate legislation to protect consumers, particularly the young.
Which is the apt title for the abstract? option1: Injuries associated with off-road vehicles among children. option2: Food procurement and the nutritional adequacy of diets in low-income families.

SOLUTION: Injuries associated with off-road vehicles among children.

PROBLEM: Abstract: Nucleated cells can resist lysis by and recover from complement attack even after formation of the potentially cytolytic membrane attack complex on the cell surface. We have found that human neutrophils resist complement lysis by the physical removal of membrane attack complexes by both endocytic and exocytic process. The latter mechanism predominates, vesiculation being detectable within 60 sec of initiating the complement cascade. Sixty-five percent of the formed complexes are removed on plasma membrane vesicles, although only 2% of the cell surface is lost. Ultrastructural examination revealed that these vesicles were covered with ring-like "classical" complement lesions. Analysis of these vesicles by gel electrophoresis indicated that C9 was present exclusively in the form of a sodium dodecyl sulfate-resistant, high m.w. complex. In contrast, the 35% of C9 that remained associated with the cells was found to be inaccessible to a C9-specific monoclonal antibody, and was partly degraded, suggesting internalization of the membrane attack complex and proteolysis of some C9 molecules. The molar ratio of C9 to C8 was 12 to 1 on shed vesicles and on recovered cells.
Which is the apt title for the abstract? option1: Recovery of human neutrophils from complement attack: removal of the membrane attack complex by endocytosis and exocytosis. option2: A thyromimetic that decreases plasma cholesterol levels without increasing cardiac activity.

SOLUTION:
Recovery of human neutrophils from complement attack: removal of the membrane attack complex by endocytosis and exocytosis.