Scenario 1: A high-risk patient
Ben’s story
Ben* is 70 years old and was diagnosed with stage IV small B-cell lymphoma 6 years ago. Read more about his history and experience with shingles.
*Not patient's real name. This is a hypothetical case for educational purposes only and does not replace clinical judgement.
Patient history
Following routine medical examinations that revealed splenomegaly and thrombocytopaenia, Ben was diagnosed with stage IV small B-cell lymphoma with bone marrow infiltration. He was treated with an initial cycle of rituximab and bendamustine.
Four years later, Ben’s condition progressed to chronic lymphocytic leukaemia (CLL) with a 13q14 deletion. Further treatment with rituximab and bendamustine was administered to manage progressive thrombocytopaenia. This resulted in near complete clinical remission for 2 years.
During a follow-up appointment, large retroperitoneal lymph nodes were detected, and after extensive discussion and informed consent, Ben commenced treatment with the Bruton's tyrosine kinase inhibitor ibrutinib.
Which aspects of Ben’s history might increase his risk
of developing shingles?
Clinical presentation
Shortly after starting ibrutinib therapy, Ben contacted your clinic reporting the sudden appearance of grouped blisters and itching around his lower left rib area that had developed over the previous 2 days.
During the physical examination, you observe:
- Grouped red vesicles in a unilateral distribution on an erythematous background
- Stable vital signs and no indication of fever
Further investigation
Ben’s rash and associated symptoms are typical of shingles, meaning diagnosis is possible based on clinical features alone.5
Polymerase chain reaction (PCR) test
While investigations are not usually needed to diagnose shingles, a PCR test can be useful in cases of diagnostic uncertainty.5,6 PCR is the most sensitive method to detect varicella zoster virus in sampled material.6
Insights from PCR testing on differential diagnosis
PCR studies have revealed that herpes simplex virus (HSV) is incorrectly diagnosed as shingles in 4–20% of cases, highlighting the similarity between these conditions in their clinical presentation.6
Shingles rash
HSV rash
Diagnosis
Based on Ben’s clinical presentation and assessment, he was diagnosed with shingles, and outpatient treatment was promptly administered. The infection resolved and Ben was able to continue his ibrutinib treatment.
Potential for complications
Ben recovered successfully from shingles, but as an immunocompromised patient, he was at a higher risk of developing complications than people who are immunocompetent.5,6 What complications might Ben have been at higher risk of?
Key learnings: Ben’s case
Ben had lymphoma, which progressed to CLL, an immunocompromising lymphoproliferative disorder that puts him at increased risk of shingles2,3
Ben presented with a rash typical of shingles, meaning diagnosis was possible based on the clinical features, but a PCR test may be helpful in cases where diagnosis is unclear5,6
Ben recovered successfully, but his immunocompromised status means his risk of developing complications was higher than that of patients who are immunocompetent5,6
References
- UK Health Security Agency. Shingles: The Green Book, chapter 28a (July 2023). https://assets.publishing.service.gov.uk/media/64c1153cd4051a000d5a9409/Shingles_Green_Book_on_Immunisation_Chapter_28a_26_7_23.pdf (accessed February 2024).
- Marra F et al. Risk factors for herpes zoster infection: A meta-analysis. Open Forum Infect Dis 2020;7:ofaa005.
- Yanni EA et al. Burden of herpes zoster in 16 selected immunocompromised populations in England: A cohort study in the Clinical Practice Research Datalink 2000–2012. BMJ Open 2018;8:e020528.
- Kawai K and Yawn BP. Risk factors for herpes zoster: A systematic review and meta-analysis. Mayo Clin Proc 2017;92:1806–1821.
- National Institute for Health and Care Excellence. Clinical knowledge summary: Shingles. https://cks.nice.org.uk/topics/shingles/ (accessed February 2024).
- Werner RN et al. European consensus-based (S2k) guideline on the management of herpes zoster - guided by the European Dermatology Forum (EDF) in cooperation with the European Academy of Dermatology and Venereology (EADV), Part 1: Diagnosis. J Eur Acad Dermatol Venereol 2017;31:9-19.
- McKay SL et al. Herpes zoster risk in immunocompromised adults in the United States: A systematic review. Clin Infect Dis 2020;71:e125-e134.
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July 2024 | NP-GB-HZU-WCNT-240027 (V1.0)