Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

[EX Q]: Abstract: 164 patients with early cancer of the lungs, i.e., without extrathoracic spread or distant metastasis, were examined. Subjective and objective characteristics of the pain were studied. A correlation was found between the location of the neoplasm, the location of the pain and the characteristics of the sensory changes. These observations may be a useful contribution to the early diagnosis of primary carcinomas of the lungs.
[EX A]: Pain in early cancer of the lungs.

[EX Q]: Abstract: Early mobilisation after arthroplasty of the knee sometimes results in wound breakdown. The two commonly used incisions, the anterior midline and the medial parapatellar incisions, were compared in order to determine which had the best potential for wound healing. Study of the cleavage lines around the knee demonstrated that the medial parapatellar incision lies parallel to the lines, whilst the anterior midline incision lies perpendicular to them. In addition, the medial parapatellar wound was found to be subjected to significantly less tension during flexion; after arthroplasty it can be expected to heal faster and to be less liable to disruption during early mobilisation.
[EX A]: Anterior midline or medial parapatellar incision for arthroplasty of the knee. A comparative study.

[EX Q]: Abstract: The importance of cell-mediated immunity in cat-scratch disease (CSD) is suggested by the positive skin test reactions and granulomatous histopathology noted in patients with this disease. However, an earlier investigation found that lymphocytes from patients with CSD and control subjects were equally unresponsive in vitro to cat-scratch antigen. In contrast, we found that 16 patients with CSD had significantly increased lymphocyte transformation responses to cat-scratch antigen when patients were compared to control subjects. This cell-mediated immune response may be directed against nonviable bacteria in the involved lymph nodes and may be the major mechanism responsible for the granulomatous reaction and clinical features of CSD.
[EX A]:
Cell-mediated immunity in cat-scratch disease.