Retinoic acid syndrome

Retinoic acid syndrome
Synonyms	Differentiation syndrome
Pronounce	N/A
Specialty	N/A
Symptoms	Fever, dyspnea, weight gain, peripheral edema, pleural effusion, pulmonary infiltrates, hypotension, renal failure
Complications	Respiratory distress, multi-organ failure
Onset	Typically within 2 weeks of starting all-trans retinoic acid (ATRA) therapy
Duration	Variable, depending on treatment
Types	N/A
Causes	Treatment with all-trans retinoic acid (ATRA) or arsenic trioxide
Risks	Acute promyelocytic leukemia (APL) patients undergoing treatment
Diagnosis	Clinical evaluation, exclusion of other causes
Differential diagnosis	Infection, pulmonary embolism, congestive heart failure
Prevention	Prophylactic use of corticosteroids in high-risk patients
Treatment	Corticosteroids (e.g., dexamethasone), supportive care
Medication	N/A
Prognosis	Generally good with prompt treatment
Frequency	Occurs in 25% of patients treated with ATRA for APL
Deaths	N/A

Retinoic acid syndrome is a potentially life-threatening medical condition that primarily occurs in patients with acute promyelocytic leukemia (APL) who are treated with all-trans retinoic acid (ATRA). The syndrome is characterized by fever, respiratory distress, weight gain, and other symptoms.

Etiology

Retinoic acid syndrome is most commonly associated with the use of ATRA in the treatment of APL. ATRA is a derivative of Vitamin A and is used to induce differentiation of the immature leukemic cells. However, in some patients, this can lead to a severe inflammatory response known as retinoic acid syndrome.

Symptoms

The symptoms of retinoic acid syndrome can vary, but often include fever, difficulty breathing, weight gain, and edema. Other symptoms can include chest pain, hypotension, and thrombosis. In severe cases, the syndrome can lead to respiratory failure and death.

Diagnosis

Diagnosis of retinoic acid syndrome is primarily based on clinical symptoms. However, laboratory tests such as complete blood count (CBC), blood chemistry, and coagulation tests may be used to support the diagnosis.

Treatment

Treatment of retinoic acid syndrome involves discontinuation of ATRA and administration of dexamethasone. In severe cases, hospitalization may be required.

Prognosis

With prompt recognition and treatment, the prognosis for retinoic acid syndrome is generally good. However, if left untreated, the syndrome can be fatal.

See also

• Acute promyelocytic leukemia
• All-trans retinoic acid
• Dexamethasone