AML was one of the earliest cancers in which a stem cell was found. AML is characterized by the presence of numerous blast cells, including myeloblasts, monoblasts, and megakaryoblasts, in the bone marrow and/or peripheral circulation. Due to the rapid progression of AML, patients should undergo rapid cytogenetics and molecular analysis to determine optimal risks and treatments [
49]. Furthermore, relapse is the greatest barrier to treating AML, as there are no effective treatments and 90% of people who experience it die. It is now well acknowledged that a persistent subset of AML cells called leukemia-initiating cells or LSCs are responsible for relapse [
50]. AML in the initiation of the disease by stromal cells and immune cells through paracrine and autocrine signals for long-term hematopoietic regulation of [
51] stem cells released factors and cytokines that defend AML cells against chemotherapeutic agents and promote drug resistance [
52,
53,
54]. Although LSC are a very rare subgroup of AML cells, they have the unique ability to establish and sustain a cellular hierarchy, and their persistence throughout remission has been associated to a poor clinical prognosis[
55,
56,
57]. It was interestingly revealed that circulating cancer cells target the "niche" in the bone marrow that is home to hematopoietic stem cells (HSCs) and, more importantly, that they compete with HSCs for occupancy of that niche[
58]. HSCs are known to associate with at least two distinct niches in the bone marrow, the endosteal niche (which contains osteoblasts) and the vascular niche (which contains endothelial cells)[
59]. Regulation of LSC and HSC contact-dependent (surface receptors and ligands) and contact-independent (cytokines, chemokines, growth factors, exosomes) interactions with the rest of the bone marrow microenvironment[
60,
61]. HSCs adapt blood production to the organism’s requirements by using cues from the bone marrow (BM) niche. Blood cancers alter the BM niche in a way that directly affects the LSCs that initiate the disease [
62]. Cancer cells and leukocytes, including lymphocytes, tumor-associated macrophages (TAM), cancer-associated fibroblasts, endothelial cells, and pericytes, form a diverse population within the tumor microenvironment, contributing to a dynamic and complex ecology [
63]. Atypical phenotypes caused by genetic and epigenetic changes to cells’ metabolism include adaptive modifications to signal transduction and transcriptional regulation, which supply the energy and biomass needed for cell proliferation [
64]. When cancer cells first connect to the endothelium, N-cadherin plays a critical part in mediating cellular contact. This heterotypic contact is the initial event in the chain of events leading to the metastatic spread of cancer cells through transendothelial migration[
65]. Here, it was observed that tumor stiffness modifies the CCN1/catenin/N-cadherin pathway, which, by making it easier for cancer cells to adhere to blood vessels, contributes to the metastatic cascade[
66]. Cysteine-rich angiogenic inducer 61 (CYR61) is a matricellular protein expressed by endothelial cells in stiff surroundings that activates β-catenin to increase N-cadherin expression. This allows cancer cells to enter the bloodstream and metastasize by stable endothelium interaction [
66,
67]. Differentiating and targeting LSCs from HSCs has been produced possible by the identification of cell membrane surface markers, such as CD33[
68], CD123[
69], CLL-1[
70], CD44[
71], CD47[
72], and CD96[
73], which are expressed preferentially on LSCs compared to HSCs in AML[
74]. The percentage of HSCs separated from a leukemia patient that carry at least the first mutation is what we refer to as the "preleukemic burden" in order to measure this heterogeneity. 39 individuals with AML were studied to determine the frequency of known leukemogenic driver mutations in HSCs, T cells, and blasts[
75]. It has been predicted that TIM3 (CD366), a member of the T cell immunoglobulin mucin (TIM) family, is a novel, important, and differentiating membrane surface marker for LSCs [
76,
77,
78,
79,
80] a negative regulator of T helper1 (Th1) cells immunity [
81] and a prognostic factor in patients with AML[
74]. High levels of TIM3 on T cells in the peripheral circulation mediate exhaustion/dysfunction of T cell in AML patients. This may be a crucial immune surveillance strategy for leukemia [
82]. LSCs have many characteristics in common with their normally functioning counterparts, such as quiescence, which is characterized by low metabolic activity[
83], high expression of anti-apoptotic proteins like Bcl-2[
84], and resistance to cellular stress and cell death caused on by chemotherapeutics [
50]. As previously discussed, cancer cells can enter a quiescent state and wait until their fitness and environmental conditions are conducive to growth in order to keep the disease undetected for a long time [
67,
85]. Stromal cells surround the sinusoidal blood vessels and are essential to HSC; it has been identified that CD271 and CD146 are markers for these cells [
86,
87,
88]. By identifying these mutational patterns, it may be possible to cure or avoid these mutations using therapies such as HSCT, in addition to estimating patient outcomes based on AML subtype and prognostic variables [
89]. Without cell division, bloodstream survival, or homecoming, LSCs increased. The self-renewal-related genes KLF4, Bmi-1, and Nanog are also expressed by LSCs, which have the ability to form sphere-like structures in vitro and weak tumors in vivo [
90]. Additionally, tumor-promoting stem cell signaling pathways such Wnt, Nanog, and Oct4 were activated by extracellular matrix (ECM) components in LSCs, resulting in the spread of metastasis [
91,
92]. It is becoming obvious that the microenvironment interacts with leukemic blasts, develops malignant cells that support LSC immune escape mechanisms, and inhibits effector cell immunocompetence, such as T- and natural killer cells [
93]. The perivascular niche is a tumor-promoting environment that is made up of a variety of micro vessels. It is responsible for regulating the dormancy of cancer cells that have spread from various primary tumors to the bone marrow, the lungs, and the brain [
94,
95,
96,
97]. The abundant availability of oxygen, nutrients, and paracrine substances found in perivascular niches makes them an ideal habitat for the growth of CSCs [
98,
99]. Dormant cells that have been adapted through genetic and epigenetic editing [
85], may contribute to disease evolution in regards to phenotype and function by promoting TME remodeling, making it "fertile soil" for propagation [
63]. Only cells grown in soft matrix express CSC markers [
100], suggesting that a flexible microenvironment may enhance cancer cell stemness, an attractive hypothesis that needs in vivo validation [
66]. Recent research has identified that CSCs can be relatively abundant (at least in some tumors), have the ability to switch between dormant and proliferating states, and are characterized by a high degree of heterogeneity and plasticity over space (that is, in different regions of the tumor) and time [
101,
102]. In general, this complex molecular cross-talk between the LSC and its gaps can be controlled by acquiring a comprehension of the interaction that maintains the LSC in a quiescent state. Epigenetic changes result in recurrence during the cytogenic compensated process. Althigh epigenetic modifications such as DNA methylation are crucial, it has been believed that identifying factors other than well-known mutations could bring the possibility of treatment closer.