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Download MBBS 2nd Year General Pathology 2 Handwritten Notes Notes

Download MBBS (Bachelor of Medicine and Bachelor of Surgery) 2nd Year (Second Year) General Pathology 2 Handwritten Notes Handwritten Notes

This post was last modified on 11 August 2021

MBBS Lecture Notes for all subjects (updated for 2021 syllabus) - All universities


HEMODYNAMIC DISORDERS, THROMBOLISM & SHOCK

THROMBO - SIS

Thrombo genesis is the process of forms of solid mass in circulating blood from the constituents of flowing blood.

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Thrombus: The solid mass formed is called thrombus. It consists of an aggregate of coagulated blood containing platelets other entrapped cellular elements of the blood.

PATHOGENESIS OF THROMBOSIS:

ETIOLOGY.

VIRCHOW'S TRIAD: Three primary abnormalities which can lead to the form of thrombus constitute Virchow's triad.

Endothelial injury (Changes in the wall of blood vessel).

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THROMBOSIS.

Changes in blood flow (Turbulence / Stasis).

Hypercoagulability of blood.

ENDOTHELIAL INJURY

Physical Endothelial injury

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Imp for the formation of thrombus in Heart

Mechanism

Physical loss of endothelium exposes thrombogenic subendothelial ECM

Platelets adhere to the site

Thrombotic tissue factor

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Local depletion of all antithrombotic factors-PHIL

CAUSE

Heart-chamber-endocardial injury due to MI

Valves-small thrombi found on valves-vegetations

VIRCHOW'S TRIAD

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Endothelial dysfunction

Abnormal blood flow

Normal blood flow-laminar

Hypercoagulability!!

THROMBOPHILIA

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DH+ Chronic disorder

Systemic disorder

Thrombosis

Associated with

Causes

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Blood cell state where induction by Stasis

Mechanism

Arterial ulcerated atherosclerotic plaque, vasculitis

Traumatic / inflammatory vascular injury

Capillaries vasculitis

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Valves inflammatory vascular endothelial ulceration

abnormally

to inflammatory cell

disturbs the tendency

moving layer of plasma

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Turbulence arterial

more turbulent effect of blood.

Thrombus form Heart

Arterial

disease major cause of

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Venous thrombosis

w/w prothrombotic activity MLA promotes endothelial

and thrombotic injury / dysfunction

tissue procoagulant activity

PAM, stimulation, Palurings platelets in contact with endo.

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Product of platelet tissue factor

TH12-1

Product of antithrombotic factor prevent washing of

Thrombomodulin, PEG22

turbulent endo.

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activated clotting factor.

prevents flowing out of

Causes

MI

deficiency of Antithromlister factors

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Protein C

Protein S

Antithrombin III

Increased Prothrombotic Factor

APC resistance

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Increased Prothrombin (II)

Factor 9,10,1,8,9,11

Non Milleteranet factor

Fibrinogen. (I)

Acquired disorder.

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Prolonged bed rest

MI / atrial fibrillation

Tissue injury Hungry

of fracture

cancer.

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TAP(hypertension), Causes

tunnel land for Heart / area firmer / arrhythmia

aquatic musk Arterial ulcerated Atherosclerotic plaque

yeim - saphenousy with vein contier,

Radiation injury.

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metabolic abnormalities

Homocystinuria

deep-y.

polycythemia vera.

hypocholesterolemia Rac acsoraus- en all

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anarmia.

Main cause.

Rate of blood flow

Usual type of thrombus

Common site-

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Color

Composition

Lines of Zahn

Propagation

Effects:

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Aspirin

ARTERIAL THROMBUS.

endothelial injury.

rapid

Mural thrombus - attached to the wall of the blood vessel.

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projects into the lumen (without complete occlusion

Heart chamber

aortic lumen.

Aorta, coronary A,

cerebral A, femoral A.

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gray-white

friable meshworks - fibrin, platelets,

RBC & degenerating WBC.

Retrograde manner from the

point of attachment of thrombus

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(i.e. towards the heart).

Ischemia (+tissue supply)

infarction of the area supported by A coronary

thrombus

VENOUS THROMBUS

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stasis

slow

Occlusive thrombus-Occludes the level of the vessel

small/met rise A.

superficial y vesicaritra &

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deep y. of leg.

blue-red.

more RBC,

relatively fewer platelets

less prominent

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Antegrade manner from the point of attachment of

thrombus towards the direction of blood flow

(i.e. towards the heart).

Thromboembolism,

edema, ulceration.

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Warfarin

Heparin

v. Thrombosis.

PALLEROTHROMBOSIS / VENOUS THROMBOSIS

Dy - Thrombosis of venous kupuprias veins of the

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deep veins of leg

Phelchothrombosis-

superficial venous Thrombus

site saphenous y

Pathogenesis

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Deep y. Thrombus (DVT)

Largely in leg / above knee

popliteal vein

femoral vein

iliac vein

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Primary platelet thrombus Damage to the endothelium

Coralline Thrombus platelet adhere to site of injury.

fibrin thrombus manager further.

accumulation of platelets

form

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fibrin & platelets with

(LINES of ZAHN)

alternate layer of the

trapped blood vessel

of thrombus

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Occluding Thrombus further growth of thrombus

occludes the lumen of vein

Consequtive Thrombus occluding thrombus stops releases

blood column beyond occluding thrombus

THROMBOPHLEBITIS

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to the endocarditis may lead to pneumonia

form

Thrombus form a freely started

mliore

Arterial / venous thrombosis may be formed

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Comment.

THROMBUS

Thrombus is the solid mass that is formed in circulation, from the constituents of the flowing blood.

always formed in vivo, within the circulatory system.

Activation of platelets is mandatory.

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we can conclude that a thrombus differs from a clot.

CLOT

clot is solid mass that is formed from the conversion of soluble fibrinogen

molecule polymerized fibrin

in e vivo, as well as in vitro in test tube

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Activation of platelets is not essential.

SHOCK

shock #BPK FCo

TYPES OF SHOCK:

CAUSES/ETIOLOGY:

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Blood loss

systemic vascular resist/

Total peripheral Resistance.

GIT bleed (peptic ulcer).

Abdominal aortic Aneurysm (AAA)

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Trauma.

post-partum hemorrhage. (PPH)

ectopic pregnancy.

Hemoptysis (Coughing es blood).

Non blood fluid loss.

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Severe plasma burn

excess vomiting.

diarrhea.

bowel destruction.

Pan Acute pancreatitis.

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pancratic protease

progressive proven

Q. How does the body compensates

medullary

centre

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sund AP from medulla

gou to

achial masth myk

within Tunica medes

of Wand vessel

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release choo

LIRI NE

cause the blood

Baroreceptors

Amuch cerated time)

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goes to the heart

try to THR

stroke vol

dependiono

Esv

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Aldosterone

TIG4 retwe

Enough blood vel

veret to commier (?a? a?s

Blood volume

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Blood volume

Low blood pressure followed by partially tang

Low blood volume

Increased systemic vascular Resistance.

Increased CBC. [ + hemorrhage

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hemorrhage

Acidosis

You Coss wrthe outp

puglycemia

loct. En watu

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athu.

watu u tour).

ruistanu

TBP

AP

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CLINICAL MANIFESTATIONS Blood vel

TH.R. (Tachycardia) non was tund Lond

The maracul - Hemowncentar

hematocril

CYANOSIS.- bluish cast on lepsi

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tongue tinguips, tou

Hypoxia ischemia necrom

rv fluid moune

multisystem organ failure

crystallards

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Normal

Ringu

Allumin, Stall

Herasraich w?

DISTRIBUTIVE SHOCK:

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Pathogenesis of circulatory shock:

Hypovolemic shock.

blood loss,

loss of plasma,

loss of fluid.)

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septic shock

(Gram tue septicemia,

Gram -ve septicemia)

cardiogenic shock

damage)

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Effective circulation

blood you chypri

venous Return to heart

C.O

Blood flow)

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02 supply (Hypots)

Anoxia.

newm

inflammatory mediato

SHOCKA Orga falle

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death.

10-0

BPICUR

blund ferme dilates

SYR

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? ?

deling

hypoxia

ischemia

PRISSUR

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ENDOTOXIC AU

Page

erstrilecctive thoik.

SEPTIC SHOCK. mapayasitec

thank

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DIC (Disseminated intravasculen

waguler)

Ischemia

Grame

Gram

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cam we list

damage here

Assues relea

chemical mediatan of

innamm

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P417

neconeg

Grame ?

Endotoxins.

TPAI-1

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microveruda

cun

Gat cra

Prateese

63

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65

27

most ter

PG

WBG.

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ROS

21

PP.

Chemotactic

Agents

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PAI

TRA

Usta

most elh.

Lelinas Hist

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Luckorima

Phi

Protease

the blood flow to fishe

9schemia

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I clat forum

Chemotactic Ageur

diate letond veci Iveredriam

make wood vesser vleeky (+plumeatsilery)

wood starts accumulating in tisme space

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BY+BP

monocyter & neurophet (WBG+

Release L

AL6

NEL

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Chemotactic Agent pull them out

Proteaser

3,5

blood you

B.P.

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neuroph

(39+159

I myocardies contrachtility

Gram-ve eace.

INF-2

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12-6

11-8

hypochasamu. PGE2 Fever.

liver Acute phase Reactiver like C-peptide

Pratim.

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Endothelial cells.

I permeaternity of endothelial cells.

401

yaradilar

go to hypothalam

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Release PH-EL

Change leody's thermo

reading

FIVO

goes to Live

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2-8

WAG

release ROS.7

12-2

TNF

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myocardial

Liver

contactilulity

class Aud

Disle

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Page

froducer Acite phase Reactive from

indi cetor that there is

lot of inflammat.

Other INBLS

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phagocytic Activity

I chemotaxis

Foru

I incidence of metro ve belt oldum

DIC

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Ischemia

1.4. annuatics-leroad specmem Alo

Crystalloids - 1x fhurd mitusion.

damage endothelial cells.

A/c - Vircho's riad.

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? Thromleont

NAW

AAL

DISEASES OF THE IMMUNE SYSTEM

Type I- HYPERSENSITIVITY.

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Hypersensitivity Reactions are Ag specific

AL

Ag

Ag exposure

(drug,

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pacien/

cood)

sensitisation of immune calle

(Primes the i'mmene system

against that Ag).

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Primed immune celk.

towards the Ag?

APPROPRIATE

MMUNE

RESPONSE.

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Type I

Type II

Type?

Type

wl mediated.

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19./ All. mediated

HYPERSENSITIVITY Ron Type-t

Immediate Reachan (Allergen ein tron)

occurs vay 108

invalues re

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recognit of ng lay porre the

?

nucleus gene

will produce (12-2)

Receptor for (12-2)

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gives signal to the cell

I uu-undergon mitose (clonal

expansion of tal)

moobropun

[12-4 ?

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binds to receptors Me

on B-cele

senutive. L

Bellen B cells starte mulhplyny

Jonal expansion of fate,

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B-cells cxpress receptas of

14-5

12-5-leinch to Receptor

all Race convert into

Plasma cells

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secrete IgE (Antipolla

(61

Ige has special recepto

on mast cell.

Agu picked

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up by

APL

B

ANTIGEN

(Allergen)

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Pollen

Food

brug

BCRYL

Bell-4-Receptor

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125-Recepte

Plein

secrète ante paller

Anilendia (IgE)

mast celn & leasophie dee IgE loaded

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mast

HLA

Preparation o? ? ? ?mwhacky

genes

12-2

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12-5

Chrowse

CD-4

Macrophage

74

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C83

nucleus

Thell

thelper-ach

Coll

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CYCRACO-A

are stimulated)

In repertory marep?

braktown pallen ng

on partially

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MHC-2017 Misceler

Lunca to pallen.

palle unor pueneu

degraded

pallen Ag will now bee

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of

exprested on the huface

APL)

macrophage along z

MHC-class molecu

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manaphage will musht

2N.

will find special type of

Tell having TERCIOUR

CA-Y

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Lind to MHL-?

Mype I-hypertensensitivity Rem

BULG

Goss linking of Igr

bby Allergen

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(za, Ga, Csa

brugs-codeine,

morphine

venome-snake bite/

Ree sting / And string

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phywlal Agure-

cold, heat,

physical Naums,

strong sunlight

plasma uel

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MOAL ULLE

Histamine

Tinglampratcases

midiaren

have

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Ron

mau cech

further stimulates

mast ulls.

CSA

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produce.

E.C.P

MEDIATOR

Gonage preformed

LATE

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granulse

MEDIA

neutrophil chemotactic facta (NCF)

cosinophilee"

Histamine

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vasodilaran

SECONDARY

MEDIATOR: try

CYTOKINES prese?

Hist R. on Lersuchral bussta w/

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I permeaterlity

Spasmogenic

Igrandalar ciner

pithelial cells.

Eotaxin

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bronchocomwhich

TNE

21

12-4

4-5

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12-6

GH-CSE

MIP

AA

yuw

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?-?

pathway

LT-R

Sathway

PG &

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LT-04

PGPH PG

22 F2

LT-E4

I glandulr

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spashiogene

lecer

Agent knowh

12-37J-help-2.

12-5 & mast alh LT-Cy

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? ? ?

-wnshichon var ogumie

damage

epit

sithelias

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cells

Eosinophile.

Groncho

(Major leaseipr

syspnew

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M-B-P

Type - Hypersensitivity Reaction

Immune mediated tissue damage.

Immune complex Inflamm"

Free. Ag. Exogenous.

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Endogenom

BOCHU

Fungal

Viral!

-

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SLE.

Ale

IgG

IgM

Ag the complement Achram & through

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i matiune comples

wif Lahmn alory

all (?)

INFLAMMATORY RXM.

Hype III H.R.

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yeneralised Ren.

(Serum sickness like Ron)

These days, it u

Localised exn.

(Arthur RXN

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due to duge.

IMMUNE COMPLEX MEDIATED IT-ITI HYPERSENSITIVITY RIN

infleted.

AT GEAR LULE Immune

globulini)

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Bone ma

sympand

Syster

Auto Reactive

Julh

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Myeloid

irculatory wintroduced.

Unage

Aplast

autore achive JULG.

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destrays.

no af/Raut, waatlemes than tympasyon) prarecer!!

Anemia Leukopenia

Thrombocytopme

RBU Platelet WB

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?

ymphay APLASTIC

PANCYTOPENIA

? ?

PANCYTOPENIA

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hone marrow cells destisyed Hypocellular/hypoplas

leone marrow

AMYLOIDOSIS

Amyloid depour

Amyloiasis i a disorals deve to alinormal ca

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of "pretum

on Amyloidosis

for these of connal mech.

PATHOGEN

sauce of misisided for yougraden Producion of abnormal

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tha

accumulate outside

the wlw.

nerable I self associated.

deposited as

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filerils in extracellula

spor

PATHOLOGICAL EFFECTS

of normal protein

Unknown (? Carcinogen

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monoclonal praciociation

ef Blympiseyter

plasma cells.

A Light chains of 19

Pressure on adjacew normal celu

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Atrophy of alle

imomplete

lbreak down

aut

seposition in wall of Wood Amyloid light (AL)

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