The plural forms for the singular lumen is lumina or lumens, both are accepted plural forms.
There are two accepted plural forms of the noun lumen:lumenslumina
The singular form of "lumina" is "lumen."
-ostomy is the medical terminology combining form meaning surgical creation of an artificial opening into a lumen.
esophagogastroduodenoscopies is the plural form
The plural and possessive of the abbreviation works better if the acronym is used: MD (no periods) or the title spelled out: Medical Doctor.The plural for of the acronym MD is MDs.The plural possessive form is MDs'.The plural form of the compound noun Medical Doctor is Medical Doctors.The plural possessive form is Medical Doctors'.
The plural form for stimulus is stimuli.
The plural of stoma is stomata.
The plural form of the word angiogaphy is "angiographies".
Correct plural of lumen is lumina. (From the latin). However, people seem to accept lumens these days. For example, the correct plural of formula is formulae, but people tend to say formulas.
Intraluminal or endoluminal means pertaining to within the lumen.
The medical term for the inner diameter of a tube is "lumen."
The plural form of the medical term "pleura" is "pleurae." The pleura refers to the membranes surrounding the lungs, and in the plural form, it denotes the two layers (visceral and parietal) that enclose each lung.