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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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IntroductionNephrotic syndrome is a kidney disorder marked by excessive protein loss in the urine, leading to various systemic complications. This condition often results from damage to the glomeruli—the kidney's filtering units—causing proteinuria, low blood protein levels, and fluid retention. Understanding the assessment, diagnosis, and management of nephrotic syndrome is essential for effective treatment and prevention of further kidney damage.AssessmentPatient History: Document...
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Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
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Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
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Nelson's Syndrome: A Narrative Review.

Jorge Alejandro Torres-Ríos1, Gerardo Romero-Luna1, Juan Marcos Meraz Soto1

  • 1Neurosurgery and Radiosurgery, National Institute of Neurology and Neurosurgery, Mexico City, MEX.

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Summary

Nelson's syndrome (NS) is a rare complication after Cushing's disease treatment. This review covers its characteristics, diagnosis challenges, and treatment controversies, including stereotactic radiosurgery.

Keywords:
cushing’s syndromenelson’s syndromeacthcushing’s diseasepituitary adenoma

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Area of Science:

  • Endocrinology
  • Oncology
  • Neurosurgery

Background:

  • Nelson's syndrome (NS) is an uncommon complication following bilateral adrenalectomy for persistent Cushing's disease.
  • Pathophysiology remains poorly understood, with an incidence of 1.8–2.6 cases per million annually.
  • NS presents with hyperpigmentation, elevated ACTH, and pituitary adenoma symptoms.

Purpose of the Study:

  • To provide a comprehensive overview of Nelson's syndrome.
  • To discuss diagnostic challenges and treatment complexities.
  • To review the role of stereotactic radiosurgery in NS management.

Main Methods:

  • Literature review of Nelson's syndrome.
  • Analysis of clinical characteristics and pathophysiology.
  • Evaluation of diagnostic criteria and therapeutic strategies.

Main Results:

  • NS is characterized by hyperpigmentation, elevated ACTH, and pituitary mass effects.
  • Diagnostic criteria are not universally accepted, complicating management.
  • Stereotactic radiosurgery is a controversial yet essential treatment option.

Conclusions:

  • Nelson's syndrome poses significant clinical challenges due to diagnostic and therapeutic complexities.
  • Further research is needed to elucidate NS pathophysiology.
  • Stereotactic radiosurgery represents a key, albeit debated, therapeutic modality for NS.