Haemotology Flashcards
Causes of macrocytic anaemia
B12
Folate- methotrexate, phenytoin, ?nitro
Alcoholism
MM
Hypothyroid
Haemolytic anaemic serology features
Increased bilirubin
Increase urinary urobillinogen
Increased LDH
Reticulocytosis
Low haptoglobin
Types of haemolytic anaemia
Acquired
Immune- warm/cold- DAT positive
Mechanism- MAHA- DIC, HUS, TTP
Heart valve
Malaria
Hereditary
G6PD, Pyruvate
Hereditary spherocytosis
SCD, thalassaemia
Types of immune mediated haemolytic anaemia and features
DAT +
Warm- IgG- extravascular haemolysis- lymphoma, SLE
Cold- IgM, intravascular
Features of HUS
E coli- O157
Diarrhoea
MAHA
Thrombocytopenia
Renal failure
Features of TTP
Attacking ADAMTS 13- which usually breakdown vWF- causes plt aggregations
Adult females
Pentad
Fever
CNS signs: confusion, seizures
MAHA
Thrombocytopenia
Renal failure
Triggers for G6PD
Broad beans
Infections
Antimalarials
Sulphonamides, cipro, nitrofuratoin
Sulphylureas
Inheritance of G6PD, SCD,
G6PD- X linked- MALES
SCD- recessive
Pernicious anaemia features
AB against IF or parietal cells
Atrophic gastritis
B12 deficiency
Peripheral neuropathy
Anaemia
Lemon tinged skin
Associated with AI diseases
Causes of B12 deficiency
Vegan - low intake
Pernicious anaemia- low IF
Crohns - affects terminal ileum
Bacterial overgrowth
Presentation of sickle cell
Splenomegaly
Infarction
Crises
Kidney
Liver/Lung
Erection
Dactylics
Complication and Tx of SCD
Sequestarion crisis- shock and severe anemia- splenectomy
Acute chest crisis- pain, O2, Abs
Aplastic crisis
Painful crisis- analgesia, hydration, O2
Causes of DIC
Sepsis, malignancy, trauma
Tumour lysis syndrome Dx
Recent chemo
Increased K, P, low Ca
Raised creatinine
Seizure, arrhythmia
Indication of RBC transfusion
ACS- maintain >80
No ACS- >70
Indication of plt transfusion
Pre-procedure- >50 , 100 if eye
No bleeding- <10
Bleeding <30
CI if BM failure, TTP, Heparin induced T
Heparin induced thrombocytopenia features
AB induce plt activation
Low plt but prothrombotic
Who gets what in FFP transfusion
If A- A, AB
If B- B, AB
If AB- only AB
If O- All
Immediate Transfusion reactions
Haemolytic- ABO incompatible, fever, agitation,DIC shock- renal failure - stop
Bacterial- temp, shock- more common in platelet
Febrile non haemolytic- just high fever- slow and paracetamol
Allergic- urticaria, anaphylaxis
TACO- high HR, BP, low SpO2- fluid overload
TRALI- anti WBC abs- ARDS- cough, SOB, bilateral infiltrates- stop
Causes of thrombophilia
Increased clotting
Factor V leiden- increased likelihood to clot
Prothrombin mutation- increased chance
Protein C and S deficiency- C and S used to prevent clotting
Antithrombin III deficiency
Cause of increased bleeding
Thrombocytopaenia- TTP, DIC, HUS
VWD
Haemophilia A and B
Features of VWD
Increased bleeding
Mildly elevated APTT- due to reduced factor 8
Cause of Howell Jolly bodies
Hyposplensim - SCD, coeliac
Cause of hypersegmented neutrophils
B12/folate deficiency
Treatment of folate and B12 deficiency together
I 1 mg of IM hydroxocobalamin 3 times each week for 2 weeks, then once every 3 months, then oral folate when b12 normal
Prophylaxis of TLS
Allopurinol
Difference between aplastic and sequestration in SCD in bloods
Both anaemic
Low reticulocytes in aplastic
High in sequestration
Ann Arbor staging
I: single lymph node
II: 2 or more lymph nodes/regions on same side of the diaphragm
III: nodes on both sides of the diaphragm
IV: spread beyond lymph nodes
Causes of polycythaemia
Secondary- hypoxia- COPD, high altitiude
Primary- PRV, EPO producing tumour
Signs of ALL
Anaemic, petechiae, infections
High metHb meaning and Tx
Dysfunctional Hb- +3 state caused by nitrate
Treat with methylene blue if acquired
Imaging for suspected MM
Whole body MRI
Polycythaemia Tx
Venesection
Aspirin
ALL vs AML vs CLL vs CML
Acute- blasts
chronic- bands- different stages of maturation
Low lymph- myeloid
WBC >100- Chronic
AML- Auer rods
ALL- anaemia, neutropenia, lymphadenopathy
CLL- lymph,
CML- Phil +ve , all stages seen, splenomegaly
CML treatment
Imatinib
Poor prognosis of lymphoma
B symptoms
Factor V leiden pathology
Resistance to protein C
Blood clot results for haemophilia
APTT- incresase
PT- normal
Bleeding time- normal
Blood clot results for von Willebran disease
APTT- increase- F8
PT- normal
BT- increased
Vit K deficiency blood clot results
APTT- increased
PT- increased
BT- normal
APTT in antiphospholipid sx
Increased
Myelofibrosis features
Massive splenomegaly
Anaemia
High plt and WBC early- but can be pancytopenia
Tear drop- poikilocytosis
Myeloma Ca, P and ALP levels
Ca high
P high
Normal ALP
Infections
Mx of ITP
Oral prednisolone
Complication of hereditary spherocytosis
Aplastic crisis
Parvovirus
Aplastic crisis sx
Jaundice, fatigue, splenomegaly
Erythema infectiosum