X-linked sideroblastic anemia (XLSA) is caused by mutations of the erythroid-specific delta-aminolevulinate synthase gene (ALAS2) resulting in deficient heme synthesis.
[ncbi.nlm.nih.gov]
AISA, Refractory Anemia with Ring Sideroblasts, MDS-RS, Pure sideroblastic Anemia, primary acquired sideroblastic anemia, acquired idiopathic sideroblastic anemia, refractory
[ebi.ac.uk]
These congenital diseases include sideroblastic anemia which can be either monosyndromic or polysyndromic (systemic expressivity).[1] Refractory anemia with ringed sideroblasts
[statpearls.com]