True about Sickle cell disease are all, Except:
**Core Concept**
Sickle cell disease (SCD) is a genetic disorder caused by a mutation in the HBB gene encoding hemoglobin subunit beta, leading to the production of abnormal hemoglobin S (HbS). This results in sickle-shaped red blood cells due to polymerization of HbS under deoxygenated conditions, causing vaso-occlusive crises and tissue damage.
**Why the Correct Answer is Right**
This question is testing knowledge of the pathophysiology and clinical manifestations of sickle cell disease. SCD is characterized by chronic hemolytic anemia, recurrent vaso-occlusive crises, and increased susceptibility to infections. The sickling process is triggered by low oxygen tension, leading to the formation of insoluble fibers of HbS within red blood cells.
**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable (missing option).
**Option B:** Not applicable (missing option).
**Option C:** Not applicable (missing option).
**Option D:** Not applicable (missing option).
**Clinical Pearl / High-Yield Fact**
A key clinical correlation in sickle cell disease is the increased risk of priapism, a prolonged erection of the penis, which can be a source of significant morbidity and pain. This complication is thought to be related to the sickling process and resultant tissue ischemia.
**Correct Answer:**
(To be completed once the missing options are provided)