Stony Brook
EMergency Medicine
Residency

(631) 444-3880

 

101 Nicolls Road,

Stony Brook, NY 11794

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The Best in FOAM Education

An Unexpected Surprise: Retinal Hemorrhage and Acute Leukemia

August 30, 2019

A 50 year old female presents to the ED for a spot in her vision. She woke up with an “ink splotch” in her right eye, located just off the center of her vision. She is sent from urgent care for ophthalmology evaluation. She denies pain, trauma, flashes, and floaters. She endorses intermittent headaches and nausea, and increased fatigue over past few weeks which she attributes to being peri-menopausal. Her PMH is consistent for hypothyroidism, for which she is taking Synthroid. She used to be a smoker but quit 20 years ago. Family history is insignificant.

 

Physical exam: 

  • Vitals: T 36.8, HR 67, BP 153/89, SpO2 98%, RR 16

  • Well appearing female

  • Non-focal neurological exam, no cerebellar findings, normal gait 

  • RRR

  • Lungs CTA

  • No skin findings, no lymphadenopathy

  • Visual acuity OD 20/25 OS 20/70 (baseline)

  • IOP OD 16, OS 14 (normal)

  • Visual fields intact to confrontation

  • PERRLA

  • No conjunctival erythema/edema

  • Fundus exam – OD + retinal hemorrhage

 

Labs: 

  • WBC 28.3, Hgb 6.0, Hct 18, Platelet count 35

  • Manual differential showed 76% blasts

  • Na 140, K 3.5, Cl 103, Bicarb 27, Glucose 127, Cr 0.78, Ca 8.9, Phos 3.5, Uric acid 3.4, Mg 2.0

  • Imaging: Non-contrast head CT – no hemorrhage/masses

 

The patient was seen by ophthalmology and diagnosed with a right retinal hemorrhage. She received follow up information for the retina clinic. The working diagnosis was hypertensive retinopathy. The rest of her exam was unremarkable. Labs were sent given her +ROS for fatigue, headache, nausea and we were soon called about a critical value.

 

Patient was diagnosed with acute leukemia with concern for blast crisis. In the ED, she was started on IVFs, allopurinol, and hydroxyurea. A peripheral smear showed numerous blasts, no Auer rods. She was admitted to the heme/oncology service for bone marrow biopsy with flow cytometry (showed 84% myeloid blast cells) and induction of chemotherapy.

 

Take Away #1

  • Look in the eye! Acute leukemia can present as retinal hemorrhage

  • One study showed retinal hemorrhages had a prevalence of 42% in a sample of newly diagnosed acute leukemia patients

  • It usually occurs at the posterior pole of the retina

  • It can sometimes have a white center (accumulation of leukemic cells)

  • The eye exam may also reveal cotton wool spots secondary to ischemia from anemia

 

Take Away #2

  • Blast crisis: an oncologic emergency

  • Acute leukemia: 20% or more blasts in the marrow or peripheral blood

  • Blast crisis (leukostasis): severely elevated blast cell count + signs and symptoms of decreased tissue perfusion

  • Increased blasts => leukostasis => hyperviscosity => decreased perfusion => ischemia or infarction (MI, CVA, ARF, limb ischemia, bowel infarction, priapism, etc)

  • 20-40% mortality rate in 1 week if left untreated!

  • Patients usually present in CNS or respiratory distress (hypoxia, headache, AMS, vision changes, stupor, coma)

  • ED management

    • aggressive hydration with isotonic fluids

    • allopurinol, hydroxyurea

    • usually refrain from using pRBCs unless life-threatening bleeding is present – can increase hyperviscosity

    • 80% are febrile – if there are no localizing symptoms, it is difficult to differentiate infection vs inflammation from leukostasis, so treat empirically.

    • Keep platelets above 20K to reduce risk of hemorrhage

  • Heme/onc consult – possible leukapheresis (just a temporizing measure, contraindicated in APL due to worsening coagulopathy) => induction chemotherapy

 

Take Away #3

  • Keep differential broad – easy to get tempted by a quick disposition especially in fast track setting, when vitals and exam seem benign and consultant has already recommended outpatient follow up. Do what is best for the patient!

Priyal Patel, MD is a current second year resident at Stony Brook Emergency Medicine.

 

References

 

Edited by Bassam Zahid, MD

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