Differential Diagnosis

• Single most likely diagnosis
  • HIV infection 2 clinical stage, herpes zoster: This diagnosis is the most likely due to the presence of grouped vesicular rashes on the left lateral surface of the trunk, which is consistent with the clinical presentation of herpes zoster. The patient's immunocompromised state due to HIV infection, as indicated by a CD4 count of 320 and a viral load of 106,000 copies/ml, further supports this diagnosis.
• Other Likely diagnoses
  • HIV infection, 2 clinical stage, dermatitis: Although the patient's symptoms could be consistent with dermatitis, the specific description of grouped vesicular rashes suggests a more likely diagnosis of herpes zoster.
  • HIV infection, 1 clinical stage, lymphadenopathy: The patient's symptoms do not specifically mention lymphadenopathy, and the presence of a rash makes this diagnosis less likely.
• Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
  • HIV infection, 4 clinical stage, Kaposi's sarcoma: Although Kaposi's sarcoma is a possibility in immunocompromised patients, the description of the rash does not specifically suggest this diagnosis. However, it is essential to consider it due to its potential severity.
  • HIV infection, 3 clinical stage, candidiasis: The patient's symptoms do not specifically suggest candidiasis, but it is essential to consider opportunistic infections in immunocompromised patients.
• Rare diagnoses
  • Other opportunistic infections or malignancies: Although rare, it is essential to consider other opportunistic infections or malignancies that can occur in immunocompromised patients, such as cytomegalovirus (CMV) infection or lymphoma. However, the patient's symptoms do not specifically suggest these diagnoses.