What are the signs, symptoms, and lab abnormalities of myelodysplastic syndromes?

What are the signs, symptoms, and lab abnormalities of myelodysplastic syndromes?
Are there different types of myelodysplastic syndromes?
Are myelodysplastic syndromes considered precancerous or cancer?
What is acute myeloid leukemia? How is it different from myelodysplastic syndromes?
Is myelodysplastic syndrome a myeloproliferative neoplasm? What are myeloproliferative neoplasms? Can an myeloproliferative neoplasms also turn into acute myeloid leukemia?