Publications by authors named "Luke Nicholas"

Article Synopsis
  • Subdural hematomas are potentially serious blood collections in the brain that can lead to emergencies, especially in older adults and those with alcohol issues.
  • Treatment usually involves surgical procedures like craniotomy or burr hole trephination to relieve pressure and remove accumulated blood.
  • A case of a 93-year-old man with acute-on-chronic bilateral subdural hematomas was successfully treated with minimal complications, highlighting a possible management approach for similar cases without severe symptoms.
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Hypersensitivity pneumonitis (HP) is a lung disease in which foreign matter is inhaled and exposed to lung parenchymal and interstitial tissue. Such matter may include pollen, molds, chemicals, and smoke. HP leads to widespread inflammation and even fibrosis in chronic forms; the main route of treatment usually involves corticosteroids and antifibrotics as needed.

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Inflammatory myofibroblastic tumors (IMTs) are rare benign tumors that can occur anywhere in the body, most commonly in the pediatric and young adult populations. The gold standard treatment is surgical resection, possibly along with chemotherapy and/or radiotherapy. IMTs have a high recurrence rate and may present with secondary symptoms, such as hemoptysis, fever, and stridor.

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Periampullary diverticula are outpouches in the mucosa in the duodenum surrounding the ampulla of Vater. Most cases of periampullary diverticuli are asymptomatic, but complications can arise, increasing a patient's mortality. Diagnosis of periampullary diverticuli is often incidental during endoscopy or imaging studies for abdominal pain.

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Head and Neck Squamous Cell Carcinoma (HNSCC) is a relatively uncommon malignancy due to the human papillomavirus or environmental factors such as excessive alcohol or tobacco use. Its most common metastatic locations are the lungs, bone, and liver. We are reporting a much more exceedingly rare site, a percutaneous endoscopic gastrostomy (PEG) site.

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Adenocarcinoma is a tragically common iteration of lung cancer. Risk factors included primary or secondary exposure to tobacco smoke, family history of the disease, and occupationally related hazards, among others. Metastasis to various distant organs may present quite late and in unusual ways, providing a challenge to healthcare providers.

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Liposarcoma is a locally aggressive tumor that may originate in soft tissue sites such as the retroperitoneum or the extremities, or less frequently, from the bone. The fatty tumor may have an insidious growth pattern and be present incidentally on imaging, or it may be present with symptoms such as small bowel or ureter obstruction. The diagnosis can be confirmed post-operatively via fluorescence in situ hybridization (FISH) with the presence of mouse double minute 2 (MDM2) homolog protein and cyclin-dependent kinase 4 (CDK4) gene amplification.

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Follicular lymphoma is the most common indolent Non-Hodgkin Lymphoma (NHL) with overall survival measured in years for the majority of patients (NHL carries a somewhat positive prognosis). Baseline clinical genetic characteristics appear to be the best predictors of the clinical course. A few cases appear to be familial; however, no consistent environmental or infectious causation has been identified.

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Uterine rupture is an obstetric emergency that traditionally occurs during delivery in a mother with previously known risk factors, especially a uterine scar. However, a rupture that occurs in an unscarred uterus is uncommon. We report a case of a low-risk mother who presented for induction of labor for late-term pregnancy, without a history of uterine surgery, required vacuum-assisted vaginal delivery for maternal exhaustion, and one hour later was noted to have postpartum hemorrhage.

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Importance: The breakdown of previously inserted intravascular devices can lead to microemboli that can clinically mimic the symptoms of common disorders, such as senile purpura, and have subtle histologic findings. However, device failure can occur gradually and start months after placement. If not identified early, microemboli to noncutaneous sites can cause significant morbidity and mortality.

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Background: The authors investigated the use of simulator platforms in fourth-year medical student education.

Objective: To evaluate which simulation platform students preferred for learning dermatologic procedures and to assess the effectiveness of the exercise in terms of the change in confidence that the students had performing dermatologic procedures.

Materials And Methods: After medical students were instructed on how to perform a punch biopsy and then assisted in executing the task, they were surveyed to determine their preferred simulation platform and simulator properties.

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Background: Simulation-based training has become popular in many surgical residencies for acquiring procedural skills, but simulator use is rare in dermatologic training.

Objective: To evaluate the perceived efficacy of obtaining dermatologic procedural skills using simulators.

Methods And Materials: Opinions of dermatology residents and staff regarding simulator use were assessed using questionnaires completed after a 2-day surgical symposium in which participants were instructed on and practiced with simulators and cadavers.

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The mitogen activated protein kinase (MAPK) cascade is a three-tiered phosphorylation cascade that is ubiquitously expressed among eukaryotic cells. Its primary function is to propagate signals from cell surface receptors to various cytosolic and nuclear targets. Recent studies have demonstrated that the MAPK cascade exhibits an all-or-none response to graded stimuli.

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The pregnane X receptor plays an integral role in the regulation of hepatic metabolism. It has been shown to regulate CYP3A4, which is the most abundant cytochrome P450 in the human liver. With its large and flexible ligand-binding domain, PXR can be activated by an enormous range of relatively small, hydrophobic, exogenous compounds.

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Article Synopsis
  • BBDR modeling is used to understand how environmental pollutants cause health effects, particularly in relation to cancer mechanisms.
  • Chemical carcinogens are classified as genotoxic or nongenotoxic, but this classification does not fully define how they act.
  • A study involving three carcinogens demonstrated that while cytotoxicity and cell proliferation are common mechanisms, the specifics of how these processes relate to tumor formation can differ significantly between chemicals.
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