Heme/Onc Flashcards
Best initial test for smoker presenting with palpable cervical lymph node
Panendoscopy
(esophagoscopy, bronchoscopy, laryngoscopy), then biopsy (suspected SCC of head and neck)
Empiric anticoagulation only for suspected ___, not for suspected ___
PE; DVT
Do not use apixaban (or direct factor Xa inhibitors) in ____
ESRD (severe renal disease)
Facial plethora (ruddy cyanosis)
Polycythemia Vera
+aquagenic pruritus
INH side effects
INH: Peripheral Neuropathy, Hepatotoxicity
Increased RBCs DDx
- PV
- Chronic hypoxia (e.g. OSA)
- EPO-producing tumors
Smudge cells on smear
CLL
Excessive bleeding after dental procedure
Hemophilia vs. vWF
B cell only disorders of immunodeficiency
XLA, CVID, IgA
B + T cell disorders of immunodeficiency
SCID, WAS, Hyper-IgM, Ataxia-telangiectasia
No response to vaccination
SCID, XLA, CVID
(Absent/low/dysfunctional B cells)
Recurrent disseminated bacterial infections (SHiN)
Complement deficiency
Recurrent GI infections, think these bugs:
Salmonella, Campylobacter
Blasts on smear
ALL
Recurrent respiratory infection general examples
PNA, sinusitis, otitis
T cell only disorders of immunodeficiency
- DiGeorge
- IL-12 receptor deficiency
- Hyper-IgE (Job)
- Chronic mucocutaneous candidiasis
Phagocyte dysfunction
CGD, LAD, ChΓ©diak-Higashi
Hematopoietic stem cell transplantation treats:
SCID or WAS
Triphalangeal thumbs
Diamond-Blackfan Anemia
(Congenital pure RBC aplasia that presents within first 3 months of life as pallor, poor feeding, congenital anomalies such as thumbs, webbed neck, cleft lip, short stature, shielded chest)
Tx: Corticosteroids
Acquired RBC aplasia in healthy children between 6mo to 5yo
TEC (Transient erythroblastopenia of childhood)
(Labs: normocytic normochromic anemia and extremely low reticulocyte count)
Most common cause of anemia in preterm infants
Anemia of prematurity
(Diminished EPO levels, shortened RBC life span, +/- blood loss)
Path: Premature infant β> Increased O2 concentration in tissues after delivery β> Normal decrease in EPO (erythropoietin) β> decreased BM reticulocyte production β> Expected RBC nadir is worsened due to SHORTER RBC life span (40-50d) from prematurity +/- frequent phlebotomy in NICU β> Early-onset anemia
Low iron/high ferritin/low TIBC
ACID (Anemia of Chronic [Inflammatory] Disease)
Microcytic anemia DDx
LIT ASS
- Lead poisoning
- Iron deficiency
- Thalassemias
- Anemia of Chronic Disease
- Sideroblastic anemia
- Spherocytosis (normal to low MCV)
RBCs in OSA
Elevated (Reactive polycythemia)
(Hypoxemia β> Increased EPO from kidneys β> Elevated H&H)
Spinal mets DDx
Lung/breast/prostate cancer, MM
ABO/Rh risk to fetus:
AB βOβ shit
βRh negative Nancyβ mom
Leukocyte alkaline phosphatase (LAP) levels
CMLow** vs. LeukeMORE reaction**
Low LAP = CML, High LAP = leukemoid reaction
Elevated MCHC
Hereditary spherocytosis
- AD North European
- Gallstones (pigmented)
- B19 Aplastic anemia
- AGLT (Acidified Glycerol Lysis Test)
- Osmotic fragility on AGLT
- EMA binding test (Eosin-5-Maleimide binding test)
- Tx: Folate, splenectomy, cholecystectomy, +/-transfusion
Elevated urinary VMA (vanillylmandelic acid)
Pheochromocytoma
Upper body edema + weight loss
SVC syndrome
(Mediastinal tumor malignancyβSCLC or NHL)
Elevated AFP + malignancy
Nonseminomatous germ cell tumor (4 Tβs) vs. HCC
- 4 Tβs = mnemonic for mediastinal mass (Teratoma in this case)
Increased in B12 deficiency, Normal in folate deficiency
Methylmalonic acid (MMA)
Absent/hypoplastic thumbs
Fanconi Anemia
- AR DNA repair defect presenting 8-16yo with bleeding, fatigue, hearing problems, and absent thumbs
- Other signs: Macrocytic anemia, short stature, absent thumbs, hypogonadism, microcephaly, hypopigmented areas, cafΓ© au lait spots, large freckles, strabismus, low-set ears, and hearing problems 2/2 conduction abnormalities
- Dx: Chromosomal breaks on genetic analysis
- Tx: HCT
Howell-Jolly bodies
SCD or splenectomy
(nuclear remnants within RBCs that are normally removed by spleen; single/blue/round on Wright stain)
Basophilic stippling DDx
- Lead poisoning
- Heavy metal poisoning
- Thalassemias
- Alcoholism
Recurrent hemarthrosis
Hemophilia A/B/C
- A = XR, FVIII
- B = XR, FIX
- C = AR, FXI
Fever + hemolysis
TTP (Thrombotic thrombocytopenic purpura)
FAT RN
- Fever
- Anemia (MAHA)
- Thrombocytopenia
- Renal disease
- Neurological sx
- Tx: Emergent plasmapheresis! (plasma exchange)
FFP is used for:
- Warfarin reversal
- Factor V deficiency
- Factor VIII deficiency (Hemophilia A)
- ATIII deficiency
- TTP
Vitamin K-dependent coagulation factors
1972 + C & S
(II, VII, IX, X, Proteins C & S)
Procoagulant meds
- TXA
- Aminocaproic acid (Amicar)
Hemolysis (LDH/Bili/Haptoglobin) + Thrombosis
PNH
(Paroxysmal Nocturnal Hemoglobinuria)
- Genetic absence of CD55 & CD59 protein anchors on RBC surface, allowing complements to attach RBCs β> hemolysis
- Dx: Absence of CD55/59 on flow
- Tx:
- Iron & Folate supplementation
- Eculizumab (mAb that inhibits complement activation)
Osteoclast inhibitor
Bisphosphonates
(Alendronate, zoledronic acid, pamidronate)
- Tx for hypercalcemia
Anemia in ESRD
EPO deficiency
- Tx = EPO therapy *BUT* always try iron first!
Drugs that induce folate deficiency
TMP
- TMP-SMX
- Methotrexate
- Phenytoin
Smudge cells on smear
CLL
ALL = lymphoblastic;
CLL =lymphocytic
- ALL = blasts on smear;
- CLL = smudge cells on smear (+ mature lymphocytes)
Pinpoint bruises
Petechiae = LOW PLATELETS!!!
Excessive bleeding after dental procedure
hemophilia vs. vWF
Recurrent respiratory
e.g. PNA, sinusitis, otitis
Recurrent GI
e.g. Salmonella, Campylobacter
Recurrent disseminated bacterial infections (SHiN)
Complement deficiency
No response to vaccination
Absent/low B cells:
Absent/low B cells:
- SCID, XLA, or CVID
Primary immunodeficiency:
SCID, XLA, CVID, IgA, WAS, Hyper-IgM
B+T d/o:
- SCID
- WAS (Wiskott-Aldrich Syndrome)
- Hyper-IgM
- Ataxia-telangiectasia
B only (humoral):
- XLA
- CVID
- IgA deficiency
T only (cellular)
- DiGeorge
- IL-12 receptor def
- Hyper-IgE (Job)
- Chronic mucocutaneous candidiasis
Phagocyte dysfunction
CGD, LAD, ChΓ©diak-Higashi
HCT Tx:
SCID or WAS
Triphalangeal thumbs
Diamond-Blackfan Anemia
Absent/hypoplastic thumbs
Fanconi Anemia
Howell-Jolly bodies
SCD or splenectomy
Hemarthrosis + easy bleeding + excessive post-dental bleeding
think hemophilia A or B (XR) or C (AR)
[VIII, IX, XI respectively]