Piloting a partially self-financed mode of human immunodeficiency virus pre-exposure prophylaxis delivery for men who have sex with men in Hong Kong.

INTRODUCTION: Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) 300 mg/emtricitabine (FTC) 200 mg is a proven strategy for preventing human immunodeficiency virus (HIV) transmission in men who have sex with men (MSM). This study aimed to test the feasibility and acceptability of PrEP delivered at a pilot clinic for MSM in Hong Kong, where PrEP service is currently unavailable. METHODS: Partially self-financed PrEP was provided to HIV-negative adult MSM with high behavioural risk of HIV transmission after excluding hepatitis B infection and renal insufficiency. Participants received daily TDF/FTC for 30 weeks at 13.3% of the drug cost. Adherence and behaviours were monitored through questionnaires while creatinine and HIV/STI (sexually transmitted infection) incidence were monitored with point-of-care and laboratory tests. Preference for continuing with PrEP was evaluated at the end of the prescription period. RESULTS: Seventy-one PrEP-naïve MSM were included in the study, of whom 57 (80%) were retained at the end of 28 weeks. Satisfactory adherence and self-limiting adverse events were reported, while none of the participants contracted HIV. Risk compensation was observed, with an STI incidence of 3.17 per 100 person-years. At the end of the prescription period, a majority (89%) indicated interest in continuing with PrEP. Preference for PrEP was associated with age ≥28 years and peer influence (P=0.04), while stigma was a concern. Price was a deterrent to self-financed PrEP, and only half (51%) considered a monthly cost of ≤HK$500 (US$1=HK$7.8) as reasonable. CONCLUSIONS: A partially self-financed mode of PrEP delivery is feasible with good retention in MSM in Hong Kong.

An unusual case of both upper and lower gastrointestinal bleeding in a kidney transplant recipient.

BACKGROUND: Tuberculosis (TB) is an uncommon opportunistic infection in immunocompromised patients. Extrapulmonary infection involving the intestine is rare and poses diagnostic difficulties. CASE REPORT: A 49-year-old man with IgA nephropathy underwent a kidney transplantation in 1996 and was put on cyclosporine, azathioprine, and steroid. He suffered from a recurrence of his primary kidney disease and had a gradual deterioration of renal function since 1998. By 2005, he presented with an unusual gastrointestinal (GI) symptom with alternating signs of upper GI bleeding - melena - as well as lower GI bleeding with fresh rectal bleeding, resulting in severe anemia with hemoglobin level down to 5.0 g/dL. At the same time, his renal function further deteriorated and necessitated the initiation of dialysis while he was maintained on low-dose immunosuppressive drugs. Repeated upper and lower GI endoscopies were either unremarkable or revealed non-specific lesions. Symptoms persisted and exploratory laparotomy finally showed a 1 cm submucosal mass at the proximal jejunum and multiple inflammatory lesions at the terminal ileum. Segmental resection of the lesions was performed and confirmed TB infection. However, despite the initiation of anti-tuberculous treatment, the patient eventually died of complications. CONCLUSION: Diagnosing TB intestinal infection is a clinical challenge. A high index of suspicion in susceptible subjects is necessary, and early surgical intervention should always be considered when facing diagnostic uncertainties.

Acute renal failure associated with prolonged intake of slimming pills containing anthraquinones.

Chinese herbal medicine preparations are widely available and often regarded by the public as natural and safe remedies for a variety of medical conditions. Nephropathy caused by Chinese herbs has previously been reported, usually involving the use of aristolochic acids. We report a 23-year-old woman who developed acute renal failure following prolonged use of a proprietary Chinese herbal slimming pill that contained anthraquinone derivatives, extracted from Rhizoma Rhei (rhubarb). The renal injury was probably aggravated by the concomitant intake of a non-steroidal anti-inflammatory drug, diclofenac. Renal pathology was that of hypocellular interstitial fibrosis. Spontaneous renal recovery occurred upon cessation of the slimming pills, but mild interstitial fibrosis and tubular atrophy was still evident histologically 4 months later. Although a causal relationship between the use of an anthraquinone-containing herbal agent and renal injury remains to be proven, phytotherapy-associated interstitial nephropathy should be considered in patients who present with unexplained renal failure.

Acute renal failure related to intravenous immunoglobulin infusion in an elderly woman.

Intravenous immunoglobulin infusion induces acute renal failure via a mechanism of osmotic nephrosis. Most reported cases are related to the use of sucrose-based intravenous immunoglobulin. Maltose-based intravenous immunoglobulin is thought to be a safer alternative and have a lower risk of renal toxicity than sucrose-based preparations. Maltase, but not sucrase, is present in the brush border of proximal convoluted renal tubules, where the maltose is metabolised. We report a case of maltose-based intravenous immunoglobulin-induced acute renal failure in an elderly diabetic woman. In this case, the risk factors included advanced age, hypovolaemia, sepsis, diabetes mellitus, and the high infusion rate of the intravenous immunoglobulin. Maltase is readily inhibited by hyperglycaemia; therefore, poor glycaemic control may predispose patients to develop acute renal failure even with the better-tolerated maltose-based intravenous immunoglobulin.

Bullous pemphigoid, an ultrastructural study of the inflammatory response: eosinophil, basophil and mast cell granule changes in multiple biopsies from one patient.

We have studied by electron and light microscopy the inflammatory reaction in lesions at various stages of clinical development from a patient with bullous pemphigoid. The evolution of clinical lesions was associated with a sequence of histopathologic events which began with alterations of mast cells and proceeded to infiltration, first with lymphocytes and later with eosinophils and basophils. Mast cells in the papillary and reticular dermis demonstrated a unique, focal, irregular loss of granule contents. Intact eosinophils demonstrated intracytoplasmic losses of granule contents and karyorrhectic and karyolytic eosinophils had released membranebound granules. Partially and completely degranulated basophils were present within a fibrin gel which formed in the dermis. Thus, the sequence of histopathologic events in the pathogenesis of bullous pemphigoid includes mast cell granule alterations and release of granule contents from eosinophils which are undergoing nuclear and cytoplasmic damage.

Panniculitis in familial Mediterranean fever. Case report with histopathologic findings.

A 79-year-old Armenian-born woman with stable, long-term familial Mediterranean fever had progression of chronic renal failure concurrently with two types of skin lesions. One lesion resembled erysipelas, which is quite common in familial Mediterranean fever, whereas the other was panniculitis, only occasionally described in familial Mediterranean fever. The unique histopathologic features of the latter are presented. The onset of acute cutaneous disease in this patient coincided with worsening renal disease and preceded a flare of disease activity in other sites after a 14-year period of quiescence. The severe and unremitting pain from the skin lesions and their tendency to form nonhealing ulcers were substantial causes of morbidity in this patient with familial Mediterranean fever.

Strongyloidiasis as a possible cause of nephrotic syndrome.

Chronic strongyloidiasis is a mild disease and has never been reported to be associated with nephrotic syndrome. Disseminated strongyloidiasis is known to have high mortality, but it frequently is not diagnosed until autopsy. We report a patient with nephrotic syndrome developing disseminated strongyloidiasis after steroid therapy. The findings in renal biopsy, the time course of the development, and resolution of nephrotic syndrome after thiabendazole treatment suggested a possible causal relationship between chronic strongyloidiasis and nephrotic syndrome. The case also demonstrated the importance of early diagnosis in disseminated strongyloidiasis and the good clinical outcome of early treatment before the development of organ failure.

Treatment of diffuse proliferative lupus glomerulonephritis: a comparison of two cyclophosphamide-containing regimens.

Cyclophosphamide (CYC) has proven beneficial in preserving renal function in patients with lupus with diffuse proliferative glomerulonephritis (DPGN). However, the optimal route of CYC administration is unknown because direct comparative studies are unavailable. In this open study, we compared the renal outcome of two historical cohorts of patients with diffuse proliferative lupus nephritis (World Health Organization classes IVa and IVb) treated with either intravenous (IV) pulse CYC (group A; n = 22) or sequential oral CYC followed by azathioprine (AZA; group B; n = 21) and followed up prospectively. Both groups of patients had similar clinical, biochemical, and renal parameters at baseline. At 24 months posttreatment, significant improvements in proteinuria, creatinine clearance, serum albumin level, and lupus serological results were evident in both groups. Compared with patients in group A, patients in group B had more complete or partial remission (90% versus 73%) and less risk for treatment failure (5% versus 14%), renal flares (5% versus 14%), and doubling of creatinine levels (5% versus 9%), but the difference was not statistically significant. However, patients treated with oral immunosuppression had an insignificant increase in rates of herpes zoster infection (19% versus 9%) and menstrual disturbance (50% versus 29%). We conclude that sequential oral immunosuppression with CYC and AZA tended to have better efficacy than IV pulse CYC in the treatment of lupus DPGN but was associated with more toxicities. Additional randomized trials involving a larger cohort of patients with a longer period of observation are necessary.

Acid-fast bacilli with cytomegalovirus and herpesvirus inclusions in the skin of an AIDS patient.

A 66-year old acquired immunodeficiency syndrome (AIDS) patient presented with cutaneous lesions suspicious for Kaposi's sarcoma. Biopsies disclosed granulomatous infiltrates with acid-fast bacilli and cytomegalovirus inclusions within macrophages and endothelial cells in one biopsy. Herpesvirus vesicle, necrotizing folliculitis, and vasculitis were observed in a second biopsy taken concurrently. These findings emphasize the polymorphous presentation of infectious disorders in AIDS and the need for multiple biopsies and for work-up with special stains in these patients.

Relationship between adequacy of dialysis and nutritional status, and their impact on patient survival on CAPD in Hong Kong.

OBJECTIVE: Superior patient survival on continuous ambulatory peritoneal dialysis (CAPD) with 3 x 2-L exchanges has been reported from Hong Kong. This study examined the relationship between indices of dialysis adequacy and nutrition and patient survival on CAPD in Hong Kong. DESIGN: A cross-sectional study on prevalent CAPD patients. Patients were assessed for indices of dialysis adequacy and nutritional status with a composite nutritional index (CNI). Patients were then followed for 24 months. Survival data were analyzed according to adequacy indices and nutritional status. SETTING: All prevalent CAPD patients in nine dialysis centers in Hong Kong as of 1 April 1996. MAIN OUTCOME MEASURE: Mortality. RESULTS: 937 patients were assessed: 68.2% were using 3 x 2-L exchanges per day; mean age was 54.6 +/- 13 years. Mean total Kt/V was 1.83 +/- 0.42 and total creatinine clearance was 55.6 +/- 19.5 L/week/1.73 m2. 19% of patients were moderately to severely malnourished according to the CNI. There was no significant correlation between indices of adequacy and serum albumin or CNI. The 1- and 2-year patient survival from the time of assessment was 90.9% and 79.8%. There was a trend toward better survival in patients with Kt/V greater than 2.0, but it was not statistically significant. Peritoneal Kt/V did not impact survival in anuric patients. Malnourished patients had poorer survival than patients who were better nourished (p = 0.0259). After adjusting for age and diabetes, CNI was predictive of mortality but Kt/V and creatinine clearance were not. CONCLUSIONS: This study demonstrates the importance of nutritional status over adequacy indices in predicting patient survival. There was a lack of correlation between nutritional status and conventional indices of dialysis adequacy.

Unexpected vascular response to epinephrine in port wine stains.

Success of argon laser therapy as a therapeutic modality for port wine stains has been correlated with the degree of vascular congestion within the lesions. Epinephrine causes vasoconstriction and erythrocyte stasis within normally innervated vessels. We tested the hypothesis that subcutaneous injection of epinephrine would cause vasoconstriction, altered hemodynamics, and increased red cell mass in port wine stains and thus allow more directed and less nonspecific damage and a better cosmetic result. Two clinically similar and adjacent areas within port wine stains were biopsied from 10 patients following subcutaneous injection of either Xylocaine or Xylocaine with epinephrine. Erythrocytes within vessels of the superficial cutaneous vascular plexus were increased in areas pretreated with Xylocaine plus epinephrine (55.3 versus 45.9 percent; p less than 0.09). This increase was seen in 9 of 10 patients studied (p less than 0.05). Epinephrine appears to increase erythrocytes within ectatic vessels of port wine stains and thus would likely improve laser energy absorption and cosmetic results.

Misplacement of a right internal jugular vein haemodialysis catheter into the mediastinum.

A 69-year-old woman with end-stage renal failure discontinued continuous ambulatory peritoneal dialysis and commenced temporary haemodialysis because of resistant peritonitis. Right internal jugular vein haemodialysis catheter placement was performed. The cuffed, tunnelled haemodialysis catheter was inserted using the modified Seldinger technique. When haemodialysis was initiated the following day, blood could not be aspirated from the catheter and the patient complained of central chest pain during the aspiration. Subsequent venography and computed tomography scan of the thorax showed that the catheter was placed extraluminally into the posterior mediastinum. The importance of a chest radiograph after placement of a central venous catheter is highlighted by this case report. Subtle deviations in catheter position from normal should alert the physician to the possibility of catheter misplacement and lead to further investigation.