Increased mean corpuscular volume

What it means

Larger than normal size of erythrocytes.

Macrocytosis refers to a mean cell volume (MCV) greater than 100 fL. If macrocytosis is an isolated abnormality, the amount of hemoglobin in the cell increases proportionately, so the mean cell hemoglobin concentration (MCHC) remains within normal limits.

Rare diseases that can present with this11

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Erythrocyte macrocytosis · Increased MCV