In evaluating cervical adenitis, which test is least likely to yield diagnostic value?

In evaluating cervical adenitis, which test is least likely to yield diagnostic value?

• A. Throat culture
• B. Mononucleosis test
• C. PPD test
• D. Chest X-ray

Answer: (D)

When assessing cervical adenitis, use tests that point to the underlying cause of the neck lymph node enlargement. A throat culture helps identify pathogens from the pharynx, such as group A Streptococcus, that can lead to cervical lymphadenitis and guide antibiotic therapy. A mononucleosis test detects EBV infection, a common cause of tender cervical nodes in adolescents. A PPD test checks for TB exposure or infection, since TB can present with cervical lymphadenitis in some cases and would change management. A chest X-ray, while useful for evaluating lung or mediastinal disease, does not diagnose the cause of cervical lymphadenitis itself. Many patients with cervical lymphadenitis due to various etiologies may have a normal chest radiograph, and it won’t identify the specific cervical node problem. So, chest X-ray is the test least likely to yield diagnostic value for evaluating cervical adenitis.

When assessing cervical adenitis, use tests that point to the underlying cause of the neck lymph node enlargement. A throat culture helps identify pathogens from the pharynx, such as group A Streptococcus, that can lead to cervical lymphadenitis and guide antibiotic therapy. A mononucleosis test detects EBV infection, a common cause of tender cervical nodes in adolescents. A PPD test checks for TB exposure or infection, since TB can present with cervical lymphadenitis in some cases and would change management.

A chest X-ray, while useful for evaluating lung or mediastinal disease, does not diagnose the cause of cervical lymphadenitis itself. Many patients with cervical lymphadenitis due to various etiologies may have a normal chest radiograph, and it won’t identify the specific cervical node problem. So, chest X-ray is the test least likely to yield diagnostic value for evaluating cervical adenitis.