I'm 41 are there any conditions where adult my age grows couple inches taller but has no other symptoms like phys changes, feet grow, voice deepen etc?

? Acromegaly: acromegaly or increase in growth hormone secretion comes on top of the list, if affect about 5 in million every year, usually age 40-45, it takes over a decade be noticed , diagnosis is by blood test and imaging see information sheet attached https://www.uptodate.com/contents/acromegaly-the-basics?source=search_result&search=acromegaly+patient+info&selectedTitle=1%7E84

Yes: a pituitary tumor causing increased Human Growth hormone can result in "adult growth" This disease entity is called ACROMEGALY . This is rare ....