Differential Diagnoses for Mumps in Male Patients

Key Clinical Context

• The Advisory Committee on Immunization Practices (ACIP) guidelines state that parotitis may have other infectious and noninfectious causes, and clinical diagnosis alone is unreliable, emphasizing the need for laboratory confirmation in patients with suspected mumps, particularly in male patients 1, 2, 4
• The Centers for Disease Control and Prevention (CDC) recommends that laboratory confirmation is essential for suspected mumps cases, as one-third of clinically diagnosed mumps cases lack serologic evidence of actual mumps infection, highlighting the importance of accurate diagnosis in male patients 1, 2, 3

Infectious Differentials

Viral Causes

• Other viral parotitis, such as Epstein-Barr virus (EBV), cytomegalovirus (CMV), HIV, influenza A, parainfluenza viruses, adenovirus, and enteroviruses, can cause parotid swelling mimicking mumps in male patients, according to the World Health Organization (WHO) 5
• HIV infection should be tested in all male patients with suspected mumps or parotitis, as HIV can present with parotid swelling during acute seroconversion or as chronic parotitis in advanced disease, as recommended by the American Academy of HIV Medicine 5, 6
• Enterovirus infections can cause parotitis and may be isolated from throat/rectal swabs or vesicles if present in male patients, according to the Infectious Diseases Society of America (IDSA) 5, 6

Critical Diagnostic Approach

• The CDC guidelines mandate laboratory confirmation for all suspected mumps cases in male patients through mumps IgM antibody testing, viral isolation from parotid duct swabs, PCR from appropriate specimens, or acute and convalescent IgG titers showing significant rise, to ensure accurate diagnosis and treatment 1, 2, 3, 5, 6
• Relying solely on clinical diagnosis leads to misdiagnosis in approximately one-third of cases, as demonstrated in prospective Canadian studies, highlighting the importance of laboratory confirmation in male patients with suspected mumps, as recommended by the Canadian Medical Association 1, 2, 3