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These conditions are conventionally recognized as distinct identities, and some suggest that they represent a spectrum of chorioretinal disease.Zafirlukast is an orally available drug (available in 10 mg and 20 mg tablets and chewable tablets), which is FDA-approved for the management of chronic asthma in adults and children ≥ 5 years old. It is used off-label for the management of chronic urticaria, prevention of exercise-induced bronchospasm, and those with asthma and allergic rhinitis.Immunocompromised patients have an impaired immune system leading to decreased resistance to infections. The immunocompromise can be innate; however, acquired immunodeficiency is far more common due to the recent advances in cancer chemotherapy, hematopoietic stem cell and solid organ transplantation, use of immunomodulatory drugs and AIDS. These recent developments have led to an increase in the number of immunocompromised patients. Pulmonary infections are quite common in immunocompromised patients owing to the respiratory tract’s constant environmental exposure. Besides the common pathogens capable of infecting an immunocompetent individual, immunocompromised patients are also at risk of infection from opportunistic pathogens. The type of pathogen involved and the severity of infection depend on the type, duration, and degree of immunodeficiency. Types of common immunodeficiencies are It is important to remember that various infections can be present simultaneously in an immunocompromised patient.Vinca alkaloids, which belong to a class of cell cycle phase M specific anti-tubulin agents, are one of the first plant alkaloids to be developed for use as anti-cancer agents in humans. This class of drugs derived from Vinca rosea (Catharanthus roseus) consists of first-generation (vincristine, vinblastine) and second-generation semi-synthetic derivatives (vinorelbine, vinflunine, and vindesine). Vinflunine, the newest fluorinated anti-microtubule agent, has been advocated to have a higher potency and lesser frequency of adverse events when compared to the older agents. They are usually used in combination with other chemotherapeutic agents (as part of multi-drug combination regimens) since they have been shown to potentiate the anti-cancer effects of these agents and are also known to be well tolerated with manageable adverse effects. These agents are highly lipophilic and attain very high intracellular concentrations, making overproduction of P-glycoprotein, which is an efflux transporter protein, a plausible mechanism of development of acquired drug resistance. Mutations in beta-tubulin with overexpression of different isotypes have also shown to correlate with the production of altered drug effects, leading to the development of resistance.Talipes equinovarus (TEV) is a congenital disorder affecting a large portion of the global population leading to decreased quality of life, disability, and mobility limitations. TEV is characterized by deformities of the foot, including cavus midfoot arch, adduction of the forefoot, hindfoot varus, and equinus. It is estimated to have an overall incidence of 1-2 in 1000 live births. Left untreated, TEV will persist into adulthood, causing loss of mobility and decreased quality of life. Currently, no known cause exists for TEV, though multiple genetic associations have been found. TEV has an increased risk associated with a family history of TEV and maternal smoking. However, studies have not shown associations with TEV and oligohydramnios, the season of birth, parental age, or parity. Typical management of TEV is non-operative and utilizes serial manipulation, casting, and bracing following the Ponseti method. For cases unresponsive to non-surgical methods, a variety of surgical approaches may be used to address TEV.The tentorium cerebelli is one of four distinguishable dural reflections which partition the cranial cavity into incomplete compartments. The falx cerebri, diaphragma sellae, and falx cerebelli constitute the other three recognizable dural folds. The French anatomist Jacques Bénigne Winslow in 1732 was the first to use the designation 'La Tente' in describing the tentorium cerebelli, which divides the cranial cavity into supratentorial and infratentorial compartments.Porje initiated the research on isosorbide in Stockholm, and the drug was marketed in Sweden in 1946. Isosorbide dinitrate was synthesized in the United States in the 1950s by Harris and colleagues. After the introduction of isosorbide, its popularity temporarily decreased as Needleman and his colleagues questioned the efficacy of isosorbide as it underwent extensive biotransformation in the liver. This opinion changed after a few years, and now it gained worldwide acceptance. Isosorbide belongs to the nitrate group of medications that acts by releasing nitric oxide (N0), thereby causing vasodilation. Isosorbide is available in two forms as isosorbide mononitrate and isosorbide dinitrate.Water constitutes about 60% of the average adult body weight and is responsible for many physiological processes in the human body. Thus, fluid and electrolyte homeostasis is critical for human survival as exemplified by the potentially devastating consequences of fluid imbalance. The balance of total body fluid is an extremely well-regulated process which ensures the maintenance of a balance between fluid gain and loss through different physiological mechanisms such as neural regulation of thirst, hormonal regulation (vasopressin and natriuretic peptides), management through the skin, hemodynamic changes, and renal control of salt and water excretion. Fluorouracil In particular, renal excretion of urine also ensures the elimination of products of metabolic activity and excess electrolytes in addition to water, thus maintaining fluid homeostasis. Fluid balance so inextricably links with electrolyte balance both in the intracellular (rich in K+ ions) and extracellular (rich in Na+ & Cl- ions) compartments, that unsurprisingly, trading of electrolytes is the core strategy of renal fluid regulation. Drugs that affect renal regulation of electrolyte excretion have the greatest effect in terms of the quantity of fluid control and thus water homeostasis.Breast ultrasound has developed into a practical solution for the evaluation of breast disease. Although mammography remains the gold standard for breast cancer screening, it presents certain imaging limitations with dense breast parenchyma. Due to this reason, ultrasound, and magnetic resonance imaging (MRI) have been expanding their role as part of supplementary breast screening procedures. The sensitivity for breast cancer detection using both mammography and ultrasound increases to 97.3%, with the false positive rate of ultrasound measured as 2.4%.Thrombin is a serine endopeptidase. The enzyme has been extensively studied and researched throughout the years for biotherapeutic purposes. Bovine thrombin was the first thrombin product approved by the US Federal Drug Administration (FDA) as an ancillary aid for topical hemostasis during surgical procedures in 1943. Adverse immunologic reactions against bovine thrombin fostered the development of human thrombin, approved by the FDA in 2007 and recombinant thrombin, approved by the FDA in 2008. The US FDA has approved these products for hemostasis, and minor bleeding control whenever oozing blood from venules and capillaries are accessible or when standard surgical techniques cannot contain the bleeding. Thrombin products have approval for use in combination with absorbable hemostatic agents, and this includes gelatin sponge, microfibrillar collagen, and oxidized regenerated cellulose. link2 Due to their porous structures, these hemostatic agents provide the required architecture for platelet aggregation and coagulation factors activation. Thrombin products are also utilized for the treatment of pseudoaneurysms (PSA). This method of treatment uses a percutaneous injection under ultrasound guidance. Thrombin, when injected in the PSA, quickly forms a fibrin polymer. This treatment is currently non-approved by the FDA.Erythema marginatum is reactive inflammatory erythema seen most commonly in association with acute rheumatic fever. Although a rare cutaneous manifestation, it is of utmost diagnostic value for acute rheumatic fever as well as other rare disorders. Erythema marginatum, an evanescent, blanchable, nonpruritic macular rash, is one of the major diagnostic criteria of acute rheumatic fever seen generally on the trunk and extremities. It can also be seen in hereditary angioedema and psittacosis.When operating in a hostile environment, whether in a military or civilian setting, the tactical medical provider’s (TMP) priority is to assess the situation and optimize their safety and the safety of others. Once any threats have been neutralized or temporarily suppressed, the next priority is to make contact with the casualty, get them out of direct fire or away from the direct threat, and apply aid without sustaining a further injury to the casualty or TMP. Given the nature of tactical medicine, the degree of safety in which the TMP will be operating will vary widely. In cases where direct care of the casualty is not possible, remote assessment and surrogate care are essential. The TMP must be able to direct casualties to perform a rapid medical evaluation on themselves or other casualties and then guide them through the initiation of life-saving treatment. This process may take place through any combination of direct (i.e., face-to-face) contact or indirect contact via bullhorn, radio, or other telecommunication devices. link3 These methods may need to be sustained until neutralization of the immediate threat, or the casualty can be removed from the hot zone to an area of cover or a formal casualty collection point (CCP).The lymphatic system is an important and often underappreciated component of the circulatory, immune, and metabolic systems. It is composed of lymphatic fluid, lymphatic vessels, and lymphatic cells. Lymphatic cells include macrophages, dendritic cells, lymphocytes, as well as lymphatic organs such as the spleen and thymus. There are three primary functions of the lymphatic system first is the maintenance of fluid balance, second is the facilitation of the absorption of dietary fats from the gastrointestinal tract to the bloodstream for metabolism or storage, and third is the enhancement and facilitation of the immune system. The lymphatic vessels reabsorb interstitial fluid from the periphery to return it to the intravascular space, which prevents fluid build up in peripheral tissues. The lymphatics allow for the immune system to function properly as it carries antigens to lymph nodes, and also carries immune cells, such as macrophages to sites of infection to begin the immune process.Trousseau’s sign for latent tetany is most commonly positive in the setting of hypocalcemia. The sign is observable as a carpopedal spasm induced by ischemia secondary to the inflation of a sphygmomanometer cuff, commonly on an individual’s arm, to 20 mmHg over their systolic blood pressure for 3 minutes. The carpopedal spasm is visualized as flexion of the wrist, thumb, and metacarpophalangeal joints with hyperextension of the fingers.