Forgot to add that elevated Elevated Platelet Distribution Width (PDW) is most commonly due to reactive thrombocytosis conditions including iron deficiency anaemia and inflammatory bowel disease.
Neutrophilic Leucocytosis with 4% Band Forms/100 WBC: 100 white blood cells (100 cell differential count) were counted and results showed elevated neutrophils (a type of white blood cell). Increased neutrophils is called neutrophilia which is also known as neutrophilic leucocytosis. Bands increase in early response to infection however your band % is within normal range (2 - 6%). This indicates another cause of elevated neurophils such as injury or acute inflammation.
Ferritin (iron storage) is considered the gold standard for diagnosing iron deficiency however they did not include this test on your labs. Your iron serum is borderline low. Elevated RDW (Random Distribution of red cell Width) can be due to vitamin B12 anaemia, folate anaemia or a concurrent iron anaemia with another type of anaemia.
Folate is trapped in an unusable form without vitamin B12 which is why low or deficient folate is a common finding with vitamin B12 deficiency. Homocysteine is elevated due to deficiency of vitamin B12 and folate. Elevated homocysteine increases the risk of blood clots, stroke, and heart attack.
The MCV (Mean Corpuscular Volume) and MCHC (Mean Corpuscular Haemoglobin Concentration) are decreased in various conditions however iron deficiency is a common cause. Low levels of creatine, BUN and lympocytes can all be due to various conditions but commonly includes malnutrition/lack of protein/protein losing enteropathy.
Based on your lab results, celiac's disease is a likely diagnosis. Celiac disease (gluten sensitivity) is an autoimmune inflammatory disease that damages the small intestine and interfers with the absorption of nutrients including iron, vitamin B12, folate, vitamin D, and protein.