Left-upper-lobe lung mass - MTINND

I wouldn't put any hyphens. - NM

Right, there are definitely no - hypens for that description sm

Look like modifers to me - MTINND

AHDI Book of Style 3 says NO hyphens, but it may depend on where you work - just passing through

Don’t mean to get in the middle of your discussion, but just another point of view.  

I have always typed it without hyphens because that is what they preferred where I work.

If you go by AHDI Book of Style 3, there would be no hyphens:

Some compound modifiers are commonly used together, or are so clear, that they are automatically read as a unit and do not need to be joined with a hyphen.

EXAMPLE:

dark brown lesion
deep tendon reflexes
jugular venous distention
left lower quadrant
low back pain

Do not use hyphens with most disease-entity modifiers even when they precede the noun. Check appropriate medical references for guidance.

EXAMPLE:

cervical disk disease
oat cell carcinoma
pelvic inflammatory disease
sickle cell disease
urinary tract infection

Thanks! The hyphens didn't look right. - DMDM

Absolutely NO hyphens. - NM