Detection of spondylolisthesis by palpation is most often done by palpating for the spinous process. Examination of an infant includes palpating the anterior fontanelle. Pain elicited by palpating certain structures may be helpful in localizing the affected area. Also, examination of an infant includes palpating the anterior fontanelle. Physical examination may reveal a "sausage-shaped" mass, felt upon palpating the abdomen. The physician gains information by inspecting, auscultating, palpating, and percussing the abdomen. The tumors can be felt as hard, round masses by palpating the abdomen. Diagnosis in a live specimen is possible in the field by palpating the abdomen. In some cases, the internal bumper may be felt by palpating the abdomen. Usually this behavior results in the ant palpating the beetle's abdomen and stopping the attack. Hydatid fremitus is a vibratory sensation felt on palpating a hydatid cyst. Care should be taken around the abdominal organs, especially the colon when palpating deeply. Probes are used for examination of internal structures by palpating, pulling of moving tissue. A thrill might be present when palpating at the apical region of the precordium.