Clinical clues to recognizing hereditary dehydrated stomatocytosis (DHSt) in children.
Estefanía Rossetti, Silvia Eandi Eberle, Fernando Aguirre et al.
✦ AI-curated · Sources linked
Case in brief
The abstract describes a series of 20 pediatric and adult patients with dehydrated hereditary stomatocytosis (DHSt), an autosomal dominant group of hemolytic disorders. Elevated mean corpuscular hemoglobin concentration (MCHC) and resistant erythrocytes suggested a possible association with PIEZO1 variants. Patients with KCNN4 variants lacked clear signs of erythrocyte dehydration; macrocytosis, hemolytic anemia, and iron overload were common with both variant groups. The report emphasizes that early recognition can help avoid unnecessary interventions and support management of anemia, iron overload, and other complications.
What made this case unusual
KCNN4-associated cases showed no clear erythrocyte dehydration, despite sharing common manifestations such as macrocytosis, hemolytic anemia, and iron overload with PIEZO1-associated cases.
Diagnostic / clinical pearl
In suspected DHSt, elevated MCHC with resistant erythrocytes may point toward PIEZO1 variants, but absence of clear erythrocyte dehydration does not exclude disease associated with KCNN4 variants.
Why it matters
Recognizing DHSt early may prevent unnecessary interventions and help guide management of anemia, iron overload, and other complications.