exam 3 pigments Flashcards


free hemogobin from damaged RBC is picked up in circulation by
hapten
What cell in the spleen/liver breaks hemoglobin into 3 parts
macrophage
3 products of hemoglobin
iron
globin
heme
How is heme processed?

How is unconjugated bilirubin processed?

Too much bilirubin in the blood
hyperbilirubinemia
bilirubinemia >> 2 mg/dl you get
jaundice
Yellow discoloration of tissue or fluid
Jaundice or Icterus = increased bilirubin in tissues
True or false
use fat to assess, especially livestock, corn fed chickens, monkeys.
false
How does hyperbilirubinemia (icterus) happen?
- Prehepatic hyperbilirubinemia
- Hepatic hyperbilirubinemia
- Posthepatic hyperbilirubinemia
hemolysis is an etiology of ____ jaundice
pre hepatic
Get this black kidney because excessive _____ filtered through the kidney is toxic to the kidney

hemoglobin
Red-brown coloration of kidney and urine – Pink serum

Hemoglobinuria due to intravascular haemolysis
Red-brown coloration of kidney and urine – Pink serum
Hemoglobinuria
tylenol causes jaundice in cats what are eitologis are there?

Prehepatic, Hepatic, or Posthepatic?

Prehepatic
Prehepatic, Hepatic, or Posthepatic?

Prehepatic - IMHA
Prehepatic, Hepatic, or Posthepatic?

Hepatic – infectious canine hepatitis (adenovirus)
Prehepatic, Hepatic, or Posthepatic?

Posthepatic – biliary calculus
Iron stored intracellularly as ferritin (bound to apoferritin) • Gross – Must have a lot to impart gross brown color
hemosideran
Stains blue-black with prussian blue / Perls
hemosideran
Hemosideran accumulation can be __ or __
- Local: Chronic congestion Hemorrhage 2. Widespread: Hemolysis Inherited disorders of Fe storage
“Heart failure cells” – hemosiderin-laden macrophages within alveoli. Local or widespread?

Localized hemosiderosis due to chronic congestion
This is ____ accumuation of hemosideran due to hemolysis

generalized
Pink-red discolored bones and teeth – Fluoresces with uv light in calves, pigs, cats

Erythropoietic porphyria
Erythropoietic porphyria is an inherited defenciy of ____
uroporphyrinogen III cosynthetase defect in heme synthesis porphyrins
What is this pigment

melanin
Disease: Flea allergy dermatitis secondaryily leads to what MDX?

MDx: Cutaneous hyperpigmentation (hypermelanosis)
Sheep brain has developmental anomaly Mdx:

MDx: meningeal melanosis
Sheep uterus developmental anomaly

MDx: endometrial melanosis
Cow lungs developmental anomaly

MDx: pleural melanosis
Pigmentation?

Melanosis
Derived from the breakdown of lipids - an un-degradable remnant of breakdown of organelles • Composed of lipid complexed with protein • Commonly in found in aged cells and injured cells (“wear and tear” pigment) • Especially accumulates in postmitotic cells

lipofuscin
Tissue obtains a brownish color after large amount of accumulation

MDx: Myocardial lipofuscinosis
Pony lesser omentum
MDx: omental carotenoid pigmentation (EXOGENOUS PIGMENTATION)

Pathogenesis: vitamin A accumulates in fatty tissues and causes yellow-orange discoloration
inhaled carbon deposits in peribronchiolar macrophage aggregates

MDx: pulmonary anthracosis
“Pneumoconiosis” = inhaled dust, anthracosis is a subtype of this
African green monkey lung

MDx: pulmonary anthracosis Pathogenesis: inhaled carbon deposits in peribronchiolar macrophage aggregates “Pneumoconiosis” = inhaled dust, anthracosis is a subtype of this
sheep liver

MDx: chronic cholangitis & biliary parasitic hematin
Macaque lung

MDx: chronic bronchiolitis and parasitic hematin & lung mites
blue indicative of

ingestion of certain anticoagulant rodenticides
this happens to puppies of moms who have been given ___ during pregnancy

tetracycline
this is a mineral deposit of ___

ca
Gritty white deposit

Ca
Lungs – Basophilic intracellular and extracellular pleomorphic granular material

Kidney – Basophilic granular material within glomerular and tubular basement membranes and renal tubular epithelial cells

what stains black with vonkossa

ca
2 types of calcification

Local deposition of calcium in areas of injury • Especially necrotic fat – calcium ions interact with fatty acids, producing insoluble calcium soaps (“saponification”) • Also muscle, granulomas, dead parasites
dystropic
Widespread deposition of calcium in otherwise normal tissues • Caused by hypercalcemia • Predilection sites – vascular intima/adventitia – gastric mucosa – renal tubular epithelium – pulmonary interstitium – basement membranes
metastatic

A

cause of hypercalcemia
*vitamin D deficiency (normally produced in kidney) and hyperphosphatemia (will precipitate out Ca) PTH production hypercalcemia

Dystrophic vs Metastatic?

metastatic

dystrophic

metastatic
hyperadrenocorticism or long term corticosteroid treatment

Calcinosis cutis
Fibrils made of stacked β -pleated sheets • Can be formed by lots of different protein monomers • Deposited and accumulates in extracellular space – COMPRESSION ATROPHY of adjacent tissues

amyloid
Enlarged, firm organs with waxy appearance – Stains blue violet when treated with iodine + sulfuric acid • Histo – Amorphous homogenous eosinophilic extracellular material (“hyaline”)

amyloid
Amorphous homogenous eosinophilic extracellular material (“hyaline”) – Stains pink and has green birefringence with polarized light when stained with Congo Red

amyloid
Which 2 most important

top 2
A dog that you treated for protein losing nephropathy…..


Glomerular amyloidosis
Pathogenesis of ‘reactive systemic amyloidosis’: Chronic inflammation liver produces SAA in response to IL-4 & IL-6 spontaneous conversion of SAA to AA formation of amyloid fibrils

Most common form in animals Hereditary in sharpeis and abyssinians Kidney, liver, spleen, lymph nodes
accumulation of uric acid in tissues
Gout
what species No uricase; uric acid is the end product – Get gout from decreased renal function, dehydration
birds reptiles
Get gout from diet, genetic disorders, chemotherapy in what species
mammals

Chalky white foci on surface of visceral organs and serous membranes (liver, myocardium, spleen, pleura, air sacs, etc…) – May involve soft tissues around joints • Histo – Needle-like clear spaces (crystals dissolve out in processing) – “Tophi” - granulomatous inflammation surrounding deposit

uric acid
?

visceral gout

visceral gout



- blood sample CBC/chem
- urine
- serum color
- mares botle feed

renal lesions
dystrophic or metatsatic?

d left m right
White cats are predisposed to damage from ___

UV radiation
Herefords are predisposed to what neoplasms?

squamous cell carcinoma eyelids
gray horses are predisposed to ???

excessive perianal melonomas usually benign