Kap Sum Foong

Dr. Kap Sum Foong

Division of Infectious Diseases, Denver Health Medical Center, Denver, Colorado, USA
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1 April 2021 in Journal of Blood Medicine
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Journal Article
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JHJackie M Helms
Jackie M Helms
KAKristin T Ansteatt
Kristin T Ansteatt
Jonathan C. RobertsJonathan C. Roberts
Jonathan C. Roberts
SKSravani Kamatam
Sravani Kamatam
Kap Sum FoongKap Sum Foong
Kap Sum Foong
Michael TarantinoMichael Tarantino
Michael Tarantino
The rollout of the SARS-CoV-2 vaccine is underway, and millions have already been vaccinated. At least 25 reports of “immune thrombocytopenia” (ITP) or “thrombocytopenia” following the Moderna or Pfizer vaccine have been added to the Vaccine Adverse Event Reporting System (VAERS) in the US. ITP is a rare but known complication of several vaccinations. SARS-CoV-2 vaccine is new, with a novel mechanism of action, and understanding the epidemiology, clinical manifestations, treatment success and natural history of post-vaccination thrombocytopenia is evolving. We report a 74-year-old man who developed refractory thrombocytopenia within one day of receiving the Moderna SARS-CoV-2 vaccine. Several hours after vaccination, he developed significant epistaxis and cutaneous purpura. Severe thrombocytopenia was documented the following day, and he developed extremity weakness and encephalopathy with facial muscle weakness. Over a 14-day period, thrombocytopenia was treated first with high dose dexamethasone, intravenous immunoglobulin, platelet transfusions, rituximab, plasma exchange (for presumed acute inflammatory demyelinating polyneuropathy (AIDP)), and four daily doses of the thrombopoietin receptor agonist (TPO-RA) eltrombopag (Promacta™), without a platelet response. Three days later, he received the TPO-RA romiplostim (Nplate™). Five days later, his platelet count began to rise and by post-vaccination day 25, his platelet count was in the normal range. Thrombocytopenia was refractory to frontline and second-line treatment. The eventual rise in his platelet count suggests that one or both TPO-RAs may have impacted platelet recovery. Possibly, but less likely given the temporality, the drug-induced thrombocytopenia was subsiding. The aggressive use of immunosuppressive treatment may jeopardize the intended purpose of the SARS-CoV-2 vaccine, and earlier use of non-immunosuppressive second-line treatment for vaccine-related severe thrombocytopenia, such as with TPO-RAs, should be considered. While it is imperative to continue the global vaccination program, vigilance to the occurrence of post-vaccination severe thrombocytopenia is warranted.

1 July 2020 in Medical Mycology
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Kap Sum FoongKap Sum Foong
Kap Sum Foong
ASAbby Sung
Abby Sung
JBJason P Burnham
Jason P Burnham
RKRyan Kronen
Ryan Kronen
QLQinghua Lian
Qinghua Lian
ASAndrej Spec
Andrej Spec
Candida infective endocarditis (CIE) is a rare but serious complication of candidemia. Incidence and risk factors associated with CIE among candidemic patients are poorly defined from small cohorts. Identification of clinical predictors associated with this entity may guide more judicious use of cardiac imaging. We conducted a retrospective analysis of all inpatients aged ≥18 years diagnosed with candidemia at our institution. CIE was diagnosed by fulfilling two of the major Duke criteria: specifically a vegetation(s) on echocardiogram and positive blood cultures for Candida spp. We used univariable and multivariable regression analyses to identify risk factors associated with CIE. Of 1,873 patients with candidemia, 47 (2.5%) were identified to have CIE. In our multivariable logistic model, existing valvular heart disease was associated with a higher risk for CIE (adjusted odds ratio [aOR], 7.66; 95% confidence interval [CI], 2.95–19.84). Predictors that demonstrated a decreased risk of CIE included infection with C. glabrata (aOR, 0.17; 95% CI, 0.04–0.69), hematologic malignancy (aOR, 0.09; 95% CI, 0.01–0.68), and receipt of total parenteral nutrition (aOR, 0.38; 95% CI, 0.16–0.91). The 90-day crude mortality for CIE was 48.9%, similar to the overall non-CIE mortality of 41.9% (P = .338). We identified a set of clinical factors that can predict the presence of CIE among patient with candidemia. These findings may reduce the need for unnecessary expensive and invasive imaging studies in a subset of patients with a lower risk profile for endocarditis and alternative infection source.

15 May 2018 in Spine
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YZYingjie Zou
Yingjie Zou
JSJames Sun
James Sun
YZYangying Zhou
Yangying Zhou
HBHarrison Xiao Bai
Harrison Xiao Bai
XHXiangyan Huang
Xiangyan Huang
LYLi Yang
Li Yang
Study Design.: Retrospective cohort analysis of patients with spinal astrocytoma from multi-institutional data and the literature. Objective.: To determine the prognostic factors, treatment, and survival of patients. Summary of Background Data.: Our current understanding of the epidemiology, prognosis, and optimal treatment of spinal astrocytoma is limited. The literature is confined to case reports or small institutional case series. Method.: Patient demographics, tumor characteristics, treatments, and outcomes were extracted. Univariate Kaplan-Meier survival analysis was performed to identify prognostic factors followed by multivariate Cox proportional hazard analysis. Wilcoxon signed-rank test was performed on pre- and postoperational functional status as measured by McCormick score. Results.: Ninety-four patients from four institutions and 339 patients from the literature were included. For the multi-institutional cohort, WHO grade IV tumors had shorter progression-free survival (PFS) than those of lower grades, whereas gross total resection (GTR) (hazard ratio [HR]: 0.41, 95% confidence interval [CI]: 0.14–1.27, P = 0.124) trended toward longer PFS when compared to subtotal resection (STR). Age 18 years or older, paresthesia as a presenting symptom, and higher WHO grade were associated with shorter overall survival (OS), whereas thoracic tumor location when compared to cervical tumor location, biopsy when compared to STR, and radiotherapy (HR: 0.42, 95% CI: 0.20–0.88, P = 0.022) were associated with longer OS. For the literature cohort, GTR (HR 0.43, 95% CI: 0.24–0.77, P = 0.005) was associated with longer PFS when compared to STR, whereas higher WHO grade was associated with shorter PFS. Higher WHO grade and recurrence/progression were associated with shorter OS. Postoperative McCormick score was significantly higher than preoperative score (P < 0.001), but subgroup analysis of the change in McCormick score by extent of resection revealed no differences among groups (P = 0.551). Conclusion.: In patients with spinal astrocytomas, GTR likely resulted in longer PFS when compared to STR. Adjuvant radiotherapy appears to be effective in improving survival outcomes for high-grade tumors. Level of Evidence: 4

1 January 2016 in ACG Case Reports Journal
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Kap Sum FoongKap Sum Foong
Kap Sum Foong
ALAshley Lee
Ashley Lee
SKShaismy Kudakachira
Shaismy Kudakachira
HRHemchand Ramberan
Hemchand Ramberan
Biliary angiodysplasia is extremely rare. Our background search revealed only a few case reports in the English literature. We present a case of angiodysplasia of the proximal common bile duct in a patient with subacute upper gastrointestinal bleeding and symptomatic anemia. A standard esophagogastroduodenoscopy with subsequent dedicated duodenoscopy revealed blood-stained bile draining from the major ampulla orifice. A contrast-enhanced magnetic resonance cholangiopancreatography was unrevealing for any pancreaticobiliary pathology. The patient subsequently underwent an endoscopic retrograde cholangiopancreatography and SpyGlass® cholangioscopy, which demonstrated intermittent bleeding from angiodysplasia in the proximal common bile duct.

18 January 2016 in American Journal of Case Reports
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Kap Sum FoongKap Sum Foong
Kap Sum Foong
ALAshley Lee
Ashley Lee
GVGustavo Vasquez
Gustavo Vasquez
BACKGROUND:Ventriculoperitoneal shunting is an effective treatment for hydrocephalus. Ventriculoperitoneal shunt (VPS) infection is a common complication. Cryptococcus neoformans as an implicated organism is rare. In this report, we describe a patien...

18 July 2019 in Clinical Infectious Diseases
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Kap Sum FoongKap Sum Foong
Kap Sum Foong
KHKevin Hsueh
Kevin Hsueh
TBThomas C Bailey
Thomas C Bailey
LLLan Luong
Lan Luong
AIAyesha Iqbal
Ayesha Iqbal
YHYasir Hamad
Yasir Hamad
A cluster of cefepime-induced neutropenia (CIN) was identified from June 2017 to May 2018 in a regional outpatient parenteral antimicrobial therapy population. Our data suggest prolonged courses of cefepime (≥2 weeks), administered by rapid intravenous push, were associated with a higher risk of CIN.