Macrodactyly is a congenital malformation characterized by an increase in the size of the fingers or toes due to abnormal nerve growth and has a low incidence of about 0.9% among congenital malformations of the extremities. Macrodystrophy usually occurs at birth, while the other fingers or toes are normal. Significant enlargement of one or several fingers may be seen, but not all fingers are necessarily involved. Cases of limited hypertrophy have been reported in which the damage involves only the distal ends of the fingers. The giant finger grows gradually with the growth of the affected child and its rate varies. Since the lesion is mostly located on one side of the finger, in addition to the entire finger being massive, it is common to see overgrowth on one side that causes the finger to curve to the side. The lesions are characterized by the proliferation of bone and fat. Macrophthalmia not only affects the morphology of the hand, but also the function. If the enlarged lesion is located in the carpal tunnel, there may also be nerve entrapment symptoms. The diagnosis of acromegaly can be confirmed by the following tests: a. CT examination of bones, joints and soft tissues CT examination of bones, joints and soft tissues is a method of examining bones, joints and soft tissues by CT. Examination process: 1. The drug is injected intravenously, and different imaging agents are used according to the purpose of the examination. After the injection, please rest quietly, do not talk to others and avoid tense body position. The waiting time after injection is different for different examination items (basically more than 40 minutes). 2.Empty urine before PET/CT examination (for tumor screening) to avoid urine contamination of body surface and clothing. 3.During the PET/CT examination of the body, both arms need to be raised, and the examination time is usually about 20 minutes; for the brain examination, both arms do not need to be raised, and the examination time is usually about 10 minutes. Usually, family members are not allowed to enter the scanning room during the scanning process. 4. When the examination is completed, the doctor on duty observes whether the image quality meets the requirements and notifies the patient to leave after approval; according to the needs of the condition, some patients may need to undergo delayed imaging or CT-enhanced scanning, and sign the informed consent form before CT-enhanced examination. II. Toe dorsiflexion test The toe dorsiflexion test is to test the size of the bunion muscle and compare both sides. It is used to diagnose lumbar discs. Procedure: The patient is placed in a supine position with both lower extremities straightened and the toes dorsiflexed with force. At the same time, the examiner presses the nail part of the bunion with his finger to test its muscle strength and compare both sides.