Renal practical I Dr Shaesta Naseem.

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Presentation transcript:

Renal practical I Dr Shaesta Naseem

KIDNEY ANATOMY: NEPHRONS FUNCTIONAL UNITS OF KIDNEY ~1.2 MILLION PER KIDNEY THREE MAIN PARTS BLOOD VESSELS RENAL CORPUSCLE RENAL TUBULE

Figure 26.6

Gross and histopathology

1-Polycystic kidney

Adult polycystic kidney disease The gross picture shows markedly enlarged kidney replacement of the renal parenchyma by numerous cysts of variable sizes . The pattern of inheritance for adult form is autosomal dominant and for childhood form is autosomal recessive . Gene which is mutated in this disorder: PKD-1 gene on the short arm of chromosome 16 Slide 21.9

2-Postsreptococcal glomerulonephritis

POSTSTREPTOCOCCAL GLOMERULONEPHRITIS

Post streptococcal Glomerulonephritis Normal glomerulus Slide 21.22

Post streptococcal glomerulonephritis: Hypercellular glomerulus; numerous capillaries contain inflammatory cells, mostly neutrophils. Notice the red blood cells in a distal tubule, to the left of the glomerulus (arrow). H&E

Post streptococcal glomerulonephritis: Section of kidney shows: The glomeruli are enlarged, lobulated and hypercellular with obliteration of capsular space. Cellularity is due to proliferation of endothelial and mesangial cells with some neutrophils. Many capillaries appear obliterated. Tubules show degenerative changes.

3- Hydronephrosis

Hydronephrosis is the term used to describe dilation of the renal pelvis and calyces associated with progressive atrophy of the kidney due to obstruction to the outflow of urine

Hydronephrosis The picture shows markedly dilated renal pelvis and calyces with atrophic and thin renal cortex /parenchyma The most common causes for hydronephrosis are foreign bodies like calculi with obstruction, atresia of the urethra , spinal cord damage with paralysis of the bladder and normal pregnancy Other causes includes: Benign prostatic hyperplasia ,carcinoma of the prostate and bladder tumours

4- Pyonephrosis

Pyonephrosis with small cortical abscesses Pyonephrosis is seen when there is total or almost complete obstruction, particularly when it is high in the urinary tract. The suppurative exudate is unable to drain and thus fills the renal pelvis, calyces, and ureter with pus.

Renal cortical pyonephrosis with renal stone impacted within a calyx

Focal hydronephrosis and pyonephrosis .

5- Chronic pyelonephritis

Chronic pyelonephritis In children , the most common cause of chronic pyelo-nephritis is reflux associated nephropathy The picture shows slightly atrophic and deformed kidneys with cortical coarse scars . It is a disorder in which chronic tubulo-interstitial inflammation and renal scarring are associated with pathologic involvement of the calyces and pelvis

CHRONIC PYELONEPHRITIS Low power

CHRONIC PYELONEPHRITIS High power The higher magnification shows peri-glomerular fibrosis , glomerular sclerosis and hyalinization with marked chronic interstitial inflammation

Chronic pyelonephritis: Section of kidney reveals that: The glomeruli show varying degrees of sclerosis and periglomerular fibrosis. The tubules show varying degrees of atrophy. Some tubules are dilated and filled with eosinophilic (pink) hyaline casts resembling colloid (thyroidization). Interstitial tissue shows chronic inflammatory cells infiltrate and fibrosis.