A Unique Case of Coexisting Anaplasmosis and Blastomycosis.

INTRODUCTION: In presenting this case of tick-borne illness in a patient with known disseminated blastomycosis, we aim to discuss the clinical reasoning and decision-making process when treating a septic presentation in a complex patient with multiple exposures and risk factors, from identifying and addressing the most devastating differentials to selecting appropriate empiric anti-infective regimens. CASE PRESENTATION: We present the case of a 60-year-old male with a medical history of diastolic heart failure, cirrhosis, sarcoidosis, hypertension, splenectomy, and recently diagnosed disseminated blastomycosis, who developed sepsis following a recent tick exposure. DISCUSSION: While a review of the literature revealed a paucity of cases of coexisting fungal and tick-borne illness, each is independently well-studied. Several reported commonalities exist between Blastomyces and Anaplasma, including endemic regions and at-risk populations.

An Unusual Case of Disseminated Erdheim-Chester Disease.

INTRODUCTION: Erdheim-Chester disease (ECD) is a rare non-Langerhans histiocytic multisystem disorder, deriving from mononuclear phagocytic cells. It is notoriously challenging to diagnose. Here we present a case of a patient with multisystem ECD. CASE PRESENTATION: A 76-year-old female with a history of Hashimoto's thyroiditis who presented with persistent leukocytosis was found to have bilateral renal enlargement with a perinephric mass, a recurrent pericardial effusion, and bilateral pleural effusions. Following biopsies of several sites of involvement, a diagnosis of ECD was made. DISCUSSION: The existing literature on ECD is sparse, and no diagnostic criteria have been put forward due to widely differing presentations, although the most common is skeletal. Definitive diagnosis requires a tissue sample. CONCLUSIONS: In presenting our clinical reasoning and approach, we hope to contribute to the existing body of literature on ECD, with the aim of ultimately having sufficient data to compile a diagnostic framework for other clinicians who encounter ECD.

Double Trouble: COVID-19 Pneumonia Concurrent With COVID-19-Associated Pulmonary Aspergillosis.

INTRODUCTION: Severe complications due to COVID-19 are a growing concern. We present a case of COVID-19 pneumonia with development of a superimposed COVID-19-associated pulmonary aspergillosis. CASE PRESENTATION: A 52-year-old unvaccinated male with a history of asthma and sleep apnea presented with progressive dyspnea 10 days after COVID-19 diagnosis. Worsening respiratory function despite broad-spectrum antibiotics and negative cultures prompted a repeat respiratory culture that revealed Aspergillus; voriconazole was initiated. DISCUSSION: The risk of COVID-19-associated pulmonary aspergillosis is highest in patients who are immunosuppressed or who receive corticosteroids to treat COVID-19 infection. Subtle and atypical presentations can be seen; our patient had only mild leukocytosis and progressive dyspnea with a negative initial respiratory culture. COVID-19-associated pulmonary aspergillosis is associated with high morbidity and mortality; thus, prompt diagnosis and treatment may confer a survival benefit. CONCLUSIONS: Despite the subtle presentation and variable radiographic findings in COVID-19- associated pulmonary aspergillosis, a low clinical threshold for workup is crucial to a timely diagnosis and treatment.