Abnormality of the intrinsic pathway

What it means

An abnormality of the intrinsic pathway (also known as the contact activation pathway) of the coagulation cascade.

The intrinsic pathway requires coagulation factors VIII, IX, X, XI, and XII, as well as the proteins prekallikrein (PK) and high-molecular-weight kininogen (HK or HMWK), in addition to calcium ions and phospholipids secreted from platelets.

Rare diseases that can present with this3

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