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Adrenal Gland Disorders01:27

Adrenal Gland Disorders

Adrenal gland disorders manifest when the production of adrenal hormones deviates from the norm, resulting in either excessive or insufficient concentrations.
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...
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Renal Corpuscle

The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
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Renal Tubule and Collecting Duct01:24

Renal Tubule and Collecting Duct

The renal tubule is divided into three parts: the proximal convoluted tubule (PCT), the Loop of Henle (LOH), and the distal convoluted tubule (DCT).
Proximal Convoluted Tubule (PCT):
The PCT is the initial segment of the renal tubule, extending from the Bowman's capsule that encloses the glomerulus. Its convoluted structure and microvilli-lined cells increase the surface area for reabsorption. The PCT reabsorbs glucose, amino acids, sodium, and water from the filtrate, ensuring essential...
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations01:26

Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations

Renal calculi, commonly termed kidney stones, are crystalline solid masses that form in the kidneys but can occur at any point within the urinary system, encompassing the kidneys, ureters, bladder, and urethra.The pathophysiology of renal stones involves several key factors: supersaturation of the urine with stone-forming constituents, changes in urine pH, a decrease in urine volume, and the presence of substances that promote or inhibit stone formation.Supersaturation of Urine: This is the...
Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
Urinary Tract Calculi VI: Surgical Management01:25

Urinary Tract Calculi VI: Surgical Management

Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...

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In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses
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Juxtaglomerular cell tumor: a case report.

Kays Chaker1, Syrine Tlili2, Alia Zehani3

  • 1Urology Department, La Rabta Hospital, BAB SAADOUN, 1006, Tunis, Tunisia. chakerkays@gmail.com.

Journal of Medical Case Reports
|April 29, 2025
PubMed
Summary
This summary is machine-generated.

A rare renin-producing tumor (reninoma) caused severe hypertension and low potassium in a young man. Surgical removal of the tumor successfully treated the condition, preserving kidney function.

Keywords:
Atypical reninomaCase reportPlasma renin activityPlasma renin concentrationReninoma

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Area of Science:

  • Nephrology
  • Endocrinology
  • Oncology

Background:

  • Reninoma, a rare juxtaglomerular tumor, excessively produces renin.
  • This leads to secondary hyperaldosteronism, causing severe hypertension and hypokalemia.
  • Malignant hypertension is a critical presentation of reninoma.

Purpose of the Study:

  • To report a case of reninoma in a young male patient.
  • To highlight the diagnostic and therapeutic approach for reninoma.
  • To emphasize the benefits of nephron-sparing surgery for juxtaglomerular tumors.

Main Methods:

  • A 35-year-old male presented with a 4-year history of severe hypertension.
  • Renal MRI revealed a 9-mm cortical lesion with characteristic imaging features.
  • The patient underwent open right partial nephrectomy, with histopathological confirmation of reninoma.

Main Results:

  • The patient presented with malignant hypertension and hypokalemia.
  • Post-nephrectomy, the patient experienced prompt recovery.
  • Histopathology confirmed the diagnosis of reninoma.

Conclusions:

  • Nephron-sparing surgery is a viable option for juxtaglomerular tumors like reninoma.
  • This surgical approach facilitates rapid recovery and preserves renal function.
  • Early diagnosis and surgical intervention are crucial for managing reninoma-induced hypertension.