Acute Hemorrhagic Edema of Infancy Clinical Presentation
- Author: Tina S Chen, MD; Chief Editor: William D James, MD more...
History
Age of onset for acute hemorrhagic edema of infancy (AHEI) usually is 4-24 months but ranges from birth to 60 months. Clinical findings develop rapidly over 24-48 hours. Associated fever is common but tends to be low grade. Upper respiratory tract infection, gastroenteritis, drug intake (ie, antibiotics), or vaccination frequently precedes AHEI.[23, 24, 25, 26] Most cases occur in winter months.
Visceral and systemic involvement are uncommon but may include the following:
- Joint pain
- Abdominal pain, gastrointestinal tract bleeding, lethal intestinal complications (eg, intussusception)[18]
- Scrotal pain and testicular torsion[19]
Spontaneous recovery usually occurs within 1-3 weeks,[27] with a reported duration of up to 35 days. Episodes of AHEI may recur.[8]
Physical
The clinical picture for acute hemorrhagic edema of infancy (AHEI) is quite typical. Patients usually are nontoxic in appearance. Characteristic, rosette-, annular-, or targetoid-shaped purpuric lesions are symmetrically distributed primarily on the face, ears, and extremities.[28, 29]
Purpura may involve the scrotum.[19, 30] Lesions may begin as urticarial plaques and enlarge up to 5 cm in diameter. The borders are sharp. Purpura of the umbilicus can be mistaken for the Cullen sign (see the image below).
This toddler with acute hemorrhagic edema of infancy has a discoloration in the area of the umbilicus similar to that described as Cullen sign. Mucosal involvement is rare but has been reported.
Acral edema involving the dorsum of the hands and feet frequently extends proximally up the extremities. Edema is usually nontender and may be asymmetric. The scalp may be involved. Joint and abdominal examinations are usually unremarkable. Note the images below.
The left leg in this patient with acute hemorrhagic edema of infancy is markedly more edematous than the right leg.
Note the concentric arcs of purpura on the patient's arm.
Despite the frightening appearance of purpura in these patients, they usually are in no significant distress. Causes
The cause of acute hemorrhagic edema of infancy (AHEI) is unknown. AHEI is likely an immune complex disorder; however, immune complexes have been demonstrated in only some cases.[20, 31]
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