Presentation on theme: "WHO Staging System for HIV/AIDS in Resource Limiting Settings"— Presentation transcript:
1WHO Staging System for HIV/AIDS in Resource Limiting Settings Unit 5HIV Basics: A Course for PhysiciansUnit 5 should take approximately 60 minutes to implementStep 1: Unit Overview and Learning Objectives (Slides 1 – 2) – 5 minutesStep 2: Clinical Stages of HIV Disease (Slides 3 – 40) – 30 minutesStep 3: Case Studies - Clinical Staging of HIV Patients (Slides 41 – 49) – 20 minutesStep 4: Summary of Key Points (Slide 50) – 5 minutes
2Learning ObjectivesDescribe how the WHO staging system is used to assist management of HIV/AIDSList the clinical conditions that characterize each WHO stage of HIV/AIDSStep 1: Unit Overview and Learning Objectives (Slides 1 – 2) – 5 minutes
3Introductory Case: Lake 33 year old male presents to ART clinic for initial evaluation. He has a history of Zoster. He reports diarrhea, intermittent fever, and itching. He stopped working as a merchant one month ago due to fatigue.What additional information is necessary for accurate WHO staging of this patient?Step 2: Clinical Stages of HIV Disease (Slides 3 – 40) – 30 minutesAdditional question for the participants: Why is staging important for the management of this patient?
4Introductory Case: Lake (2) Diarrhea occurred daily, was non-bloody, and began 2 months agoFever began 2 months agoWt loss of 8 kg (50 ->42kg) over last 6 monthsHistory of PTB treatment 1 year agoNo cough, night sweatsExam revealed thrush and papular rash on trunk and extremitiesCXR normalStool exam normalHCT 9 g/dlBased on these finding, the patient meets criteria for HIV wasting syndrome, placing him in WHO stage IV.Chronic unexplained diarrhea, fever, and weight loss independently are stage III defining conditions as is PTB diagnosed within the last two years, and thrush.What condition in this patient is a WHO stage II defining illness? (PPE)
5WHO Staging System for HIV/AIDS: Overview Tool used to guide management of HIV patient in resource limited settings with limited laboratory accessClinically based; CD4 count not requiredSimple, flexible and widely usedRecently revised: Interim African version 2005Utilizes 5 clinical stages based on the degree of immunocompromise and prognosisPrimary HIV Infection, I,II, III, IVIt is used in Ethiopia to assist with clinical decision-making, such as decisions on starting, substituting, switching, and stopping ART.It originally allowed for “down-staging” only (e.g. Stage II->III) in light of the natural progression of HIV infection, with no reversal or improvement allowed.The latest revision, however, allows for bi-directional staging over time, recognizing that ART can change the prognosis of patients and block the inevitable progression to AIDS.
6WHO Staging System for HIV/AIDS: Overview (2) Performed at each clinical visitDiagnosisEntry to clinical care (pre-ART)Follow-upStage assessment can be adjusted upwards or downwards over time according to response to ART and/or clinical progressionAssessment of clinical stage at each clinical visit also provides useful information on current clinical status, and can guide clinical decision making.The ability to modify WHO stage over time reflects the most recent WHO revision. But this may require judgment. For example, what is the stage of an otherwise healthy HIV patient who has fully recovered from PCP two weeks ago. (Is this patient stage I or IV??)
7WHO Staging of HIV/AIDS Primary HIV InfectionStage I - asymptomaticStage II - mild diseaseStage III - moderate diseaseStage IV - advanced immunocompromiseThe following slides will review the specific conditions that comprise each stage. Primary HIV infection will be discussed in a different section.
8WHO Stage I Asymptomatic or Persistent generalized lymphadenopathy (PGL)
9Persistent Generalized Lymphadenopathy (PGL) Swollen glands (>1cm) in two or more areas outside the groin, >3moLymph nodes are firm, painlessOccurs in the back of neck, under the jaw, and in armpitWhat is the differential diagnosis of this finding? (TB, lymphoma, bacteria)Courtesy of Charles Steinberg MD
10WHO Stage IIModerate unexplained weight loss (<10% of presumed or measured body weight)Recurrent respiratory tract infections (RTIs, sinusitis, bronchitis, otitis media, pharyngitis)Herpes zosterAngular cheilitisRecurrent oral ulcerationsPapular pruritic eruptionsSeborrhoeic dermatitisFungal nail infections of fingers
11Pruritic Papular Eruption (PPE) EpidemiologySubstantial cause of HIV-related morbidity in sub-Saharan AfricaPrevalence ranges from 12-46%Uncommon in HIV negative patients (PPV of 82-87%; may play role in diagnosing HIV)Probably related to hypersensitivity to arthropod bitesSome clinical conditions, such as PPE, are reviewed here because they are not covered in the OI section and is particularly common in Ethiopia.The differential diagnosis includes scabies, which can be difficult to differentiate. Scabies tends to involve the web of fingers, groin, underarms, and breast areas, but can be diffuse.. Often it is reasonable to treat empirically for scabies if the diagnosis is at all in question.
12Pruritic Papular Eruption (2) Clinical ManifestationsIntensely pruritic, discrete, firm, papules; variable stages of developmentExcoriation results in pigmentation, scarring and nodulesPredilection for extremities, but may involve trunk and faceSeverity of rash correlates with CD4 countTreatmentTopical steroid and oral antihistamines; however often refractory
13Pruritic Papular Eruption Shown here is the right leg of a 30 year old man, who presents with a severe pruritic rash involving both extremities and trunk for 7-8 months.Courtesy of Charles Steinberg MD
14Pruritic Papular Eruption Another patient with a chronic itchy rash involving extremities and trunk, consistent with PPE.Courtesy of Charles Steinberg MD
16Herpes Zoster25 year-old woman presents with a painful, vesicular rash (now crusted) involving left side of face, associated with left eye blurred vision. Source:Courtesy of Tom Thacher, MDCourtesy of the Public Health Image Library/CDC
17Herpes Zoster18 year old woman with hypopigmented scar involving left lower back, along a lumbar dermatome distribution. photo courtesy Samuel Anderson, MDCourtesy of Samuel Anderson, MD
18Molluscum Contagiosum This 35 year-old man presented with asymptomatic papular lesions on his face. On close examination, these lesions have an“indented or scooped-out” center. photo courtesy Samuel Anderson MDMolluscum contagiousum is caused by a pox virus and can be spread by skin-to-skin contact. They usually appear on the face and can be quite extensive in advanced immunosuppression. There are no systemic symptoms.They can appear similar to cutaneous fungal infections, like cryptoccocus. However, the appearance of MC is differentiated by the presence of an umbilicated center and pearly white or skin colored appearance.In contrast, the fungal infections are accompanied by systemic illness which may include pneumonia, meningitis and visual impairment. In cryptococcus the lesions may ulcerate and deposit an exudate that feels “gritty” when rubbed between the finger tips.
19WHO Stage IIIConditions where a presumptive diagnosis can be made on the basis of clinical signs or simple investigationsSevere weight loss (>10% of presumed or measured body weight)Unexplained chronic diarrhea for > one monthUnexplained persistent fever (intermittent or constant for > one month)Oral candidiasisOral hairy leukoplakiaPulmonary tuberculosis (TB) diagnosed in last two yearsSevere presumed bacterial infections (e.g. pneumonia, empyema, pyomyositis, bone or joint infection, meningitis, bacteremia)Acute necrotizing ulcerative stomatitis, gingivitis or periodontitisBoth stage III and IV conditions are classified as either presumptive diagnoses or definitive (based on confirmatory testing).Important to note that diarrhea and fever of Stage III must be unexplained (i.e. normal stool exam and appropriate work-up for fever).Severe pneumonia might be defined by the presence of hypoxemia or associated organ failure, requiring of hospitalization.
20WHO Stage III (2)Conditions where confirmatory diagnostic testing is necessaryUnexplained anemia (<8 g/dl), and orneutropenia (<500/mm3) and orthrombocytopenia (<50 000/ mm3) for more than one monthThese conditions are new additions to the WHO staging
21Oral CandidiasisThis is a 22 year old woman with HIV, CD4 120, presenting with white lesion on the posterior tongue (and buccal mucosa - not shown).This lesion could be scrapped off easily by tongue blade, supportive of candida.Courtesy of Dr. R. OjohCourtesy of Samuel Anderson, MD
22Oral Candidiasis (2)Need to question patients for symptoms of odynophagia (pain with swallowing) which might indicate candida esophagitis, a more advanced infection in HIV.A more severe case of oral candidiasis with lip, tongue, palate involvement. Involvement at the commissures of the lips is called angular chelosis. This can be extremely painful and interfere with feeding. Another name for this fissure condition is “perleche.”Source:
23Oral Hairy leukoplakia Lesions are typically thick and do not scrape off.Need to have repeat evaluations as some early oral cancers can have a similar appearance.This condition can be differentiated from oral candidiasis by the absence of pain or discomfort in the affected area of the tongue. On clinical exam you will see hair-like projections on the lateral margins of the tongue. These may be on one or both sides of the tongue and are white or gray/white in color and cannot be scraped off. The etiology is Epstein Barr Virus (EBV) and requires no treatment and in fact does not respond to antifungal therapy as used in candida. Improvement in appearance occurs with ARV treatment (or with Acyclovir if treatment is needed for cosmetic reasons).Presence of OHL or oral candida in an HIV status unknown patient should prompt HIV counseling and testing.Courtesy of Dr. R. Ojoh
24Pyomyositis Large muscle groups, may be bilateral Pathophysiology unclearTends to occur with advanced HIV infectionDiagnosis requires:High index of suspicionCT, ultrasonographyStaphylococcus aureus is the most commonly implicated organismTreatment usually requires needle aspiration and/or surgical incision and drainage in addition to intravenous antibioticsHistory of preceding local trauma described in 25% to 63% of cases of tropical pyomyositis
25PyomyositisThis patient presented with acute onset painful, swollen thigh muscle, associated with fever and nausea; photo courtesy Samuel Anderson MDCourtesy of Samuel Anderson, MD
26WHO Stage IVConditions where a presumptive diagnosis can be made on the basis of clinical signs or simple investigationsHIV wasting syndromePneumocystis pneumoniaRecurrent severe or radiological bacterial pneumoniaChronic herpes simplex infection (orolabial, genital or anorectal of more than one month’s duration)Oesophageal candidiasisExtrapulmonary TBKaposi’s sarcomaCentral nervous system (CNS) toxoplasmosisHIV encephalopathyNote that bacterial pneumonia, when “recurrent severe or recurrent radiographic”, has been reclassified into a Stage IV condition.While extrapulmonary TB (e.g. adenitis) is seen commonly in HIV-negative Ethiopians, it often reflects advance HIV disease in HIV-positive patients and is therefore considered a stage IV condition.
27WHO Stage IV (2)Conditions where confirmatory diagnostic testing is necessary:Extrapulmonary cryptococcosis including meningitisDisseminated non-tuberculous mycobacteria infectionProgressive multifocal leukoencephalopathy (PML)Candida of trachea, bronchi or lungsCryptosporidiosisIsosporiasisVisceral herpes simplex infection
28WHO Stage IV (3)Conditions where confirmatory diagnostic testing is necessary:Cytomegalovirus (CMV) infection (retinitis or of an organ other than liver, spleen or lymph nodes)Any disseminated mycosis (e.g. histoplasmosis, coccidiomycosis, penicilliosis)Recurrent non-typhoidal salmonella septicemiaLymphoma (cerebral or B cell non-Hodgkin)Invasive cervical carcinomaVisceral leishmaniasis
30Disseminated Cutaneous Cryptococcosis This 22 year old woman presented with extensive papular rash involving the face, associated with headache and confusion.Lumbar puncture revealed fungal elements on india ink staining.Courtesy of Samuel Anderson, MD
31Disseminated cutaneous cryptococcosis (2) Head ache had resolved and skin lesions show partial recession after 10 days of high dose oral fluconazoleCourtesy of Samuel Anderson, MD
32HIV wasting syndrome Weight loss >10% body weight plus Unexplained chronic diarrhea (>1 mo) orUnexplained fever (>1 mo) plus chronic weaknessThis diagnosis requires a combination of signs.
33HIV encephalopathy (AIDS dementia complex) Dementia - persistent cognitive decline with preserved alertnessComplex - concomitantly altered motor performance and, at times, behavior; myelopathy may be prominentDisabling condition that interferes with activities of daily livingProgresses over weeks to monthsAbsence of concurrent illness or condition that could explain findingsLimited treatment options; ART may be helpfulThis diagnosis requires a combination of both dementia and motor symptoms
34Kaposi’s sarcoma Epidemiology Clinical manifestations Human herpesvirus-8 (HHV-8) necessary but not sufficient for KS to developmost common AIDS-associated neoplasmincreased frequency in all HIV transmission groups compared to the general populationClinical manifestationsVariable, from an indolent process to a disseminated, aggressive diseaseskin lesionsoral lesionsothers sitesClinical manifestationsVariable, from an indolent process to a disseminated, aggressive diseaseskin lesions: painless pigmented macules, plaques, papules, or nodules; range in size from a few millimeters to large confluent areasoral lesions: hard palate lesions are most common; seen also on gingiva, tongue, uvula, tonsils, pharynx;others sites: lung, GI tract, liver, lymph nodes (lymphedema)
35Kaposi’s Sarcoma: Management ART: an essential component of KS management; lesions may regressLocal irradiation: bulky/obstructive lesions (e.g. oropharyngeal)Systemic IFN-alfa: slow progressive diseaseSystemic chemotherapy: rapid, life threatening disease including pulmonary or severe lymphedema
36Kaposi’s SarcomaDark asymptomatic macules and papules characterize Kaposi’s sarcoma.This condition can create symptoms due to mass effect (eg orpharyngeal) and bleeding (GI or pulmonary)source:Courtesy of Tom Thacher, MD
37Kaposi’s SarcomaThis 32 year-old man presented with extensive dark macular lesions on face, trunk, and back.His face was also very edematous, a consequence of extensive lymphatic obstruction, with significant resolution seen here after one month of ART.Courtesy of Samuel Anderson, MD
38Introductory Case: Lake (3) The patient was counseled and started on NVP/3TC/d4T. At his 6 month f/u visit, he states that his symptoms have resolved and he has returned to work.Examination reveals wt of 47kg and a persistent papular lesions with evidence of recent excoriations.What additional information is necessary for current WHO staging of this patient?The patient has responded clinically to ART.The present findings are consistent with WHO stage II, based on the presence of minor cutaneous findings (PPE). However, further history should be obtained to characterize this rash - it may be drug reaction.
39Introductory Case: Lake (4) The patient returns again after 12 months of ART. He has developed head ache, anorexia, cough, and unilateral weakness.What additional information is needed for current WHO staging of this patient?New symptoms in a patient should prompt the physician to evaluate for treatment failure. The clinician needs to obtain a full history & physical examination, CD4 count, and CXR and sputum. Adherence to regimen must be assessed.
40Introductory Case: Lake (5) Wt is now 40kgThrush is presentSpastic left hemiparesis is confirmedCXR normalSputum negative for AFBAny additional information necessary for staging this patient?Presence of unilateral hemiparesis is suggestive of toxoplasmosis, though CNS -pulmonary symptoms may be consistent with disseminated TB.If available, a downward trend in CD4 count would be supportive of treatment failure.In this patient resolution of headache and partial return of strength occurred after 5 days of anti-toxo treatment; the patient was re-staged WHO stage IV.
41Case StudiesStep 3: Case Studies - Clinical Staging of HIV Patients (Slides 41 – 49) – 20 minutes
42Case Study: BetrukanBetrukan, 19, meets a man she likes very much who lives in the same town. Solomon, handsome, funny and a few years older, has his own butchery. Solomon is unaware that he has been living with HIV for 3 years. Solomon and Bertukan become a couple. They have unprotected sex as Bertukan, a secretary for a medical office, has been on OCPs (oral contraceptive pills) for a year.
43Case Study: Betrukan (2) Ten days later, Bertukan misses work due to a flu-like illness. She has fever, her joints ache and her glands are swollen.2 months later, Bertukan decides to be tested for HIV, but Solomon declines. Bertukan feels well. Bertukan gets tested, and is seroreactive.
44Case Study: Betrukan (3) What are some reasons people might not get their test results?What is Bertukan’s WHO classification?What is Solomon’s WHO classification?Answers:Fear of finding out results, denial, other?Stage IUnknown, but suspect Stage I with information given.
45Case Study: Betrukan (4) Eighteen months later Bertukan and Solomon are expecting their first baby. Her antenatal clinic has been providing HIV information and PMTCT for some time. Group education regarding HIV and safe motherhood includes HIV testing as routine pre-natal care.She discloses her status to Solomon who has not been feeling well – he has lost 4 kg in the past few weeks and has been having diarrhea. He agrees to HIV testing and his test is positive.
46Case Study: Betrukan (5) What WHO stage is Solomon now?What should happen next at the clinic?Answers:Stage II vs III (diarrhea, wt. loss). Need to assess duration and cause of diarrhea. Also need to quantify % body wt loss.Assess TLC or CD4 count. If CD4 <200, start co-trimoxazole preventive therapy (CPT). Evaluate and rule out active TB. Consider Solomon for ART. Note: HIV and pregnancy will be addressed in detail in a later Unit.
47Case Study: Rahel37yo Ethiopian woman presents w/1 yr history of oral candidiasis. HIV Elisa negative 1 yr ago. Repeat Elisa was positive and she is referred to your clinic.PMH: non contributorySH: lives alone, earns 500 birr/mo, no ETOH, has no current sex partner and no prior use of condoms or birth controlROS: non-contributory.
48Case Study: Rahel (2) Tearful woman T37, Wt 55kg,Ht 5’5” HEENT: white plaques / pseudomembranes on posterior pharynx , no OHL, no adenopathyHeart, Lungs, Abd: normalSkin: seborrheic dermatitis of facePelvic: thick, white discharge, KOH+
49Case Study: Rahel (3) What is her current WHO stage? Is she a candidate for ART?What are the immediate health care issues to be addressed at initial visit?What other issues need to be addressed before ART is considered?Current WHO Stage III (thrush)Yes, she is eligible for ARTCandidiasis (OP and vaginal)Financial, food, support system, assess for depression, adherence issues, condom use
50Key PointsWHO Staging of HIV/AIDS is an important tool used for management of HIV in resource limited settingsStaging is based on clinical conditions that correlate with the degree of immunocompromise and prognosisStaging should be assessed at time of HIV diagnosis, prior to starting ART, and with each follow-up visit to assess response to ARTStep 4: Summary of Key Points (Slide 50) – 5 minutes