Adjective modifier

• white: He's likely to be in for around 3 weeks depending on how quickly his white blood count can recover.

Modifies a noun

• change: Blood & Lymphatic System Disorders Very Rare: Blood count changes ( leucopenia, thrombocytopenia ).

Noun used with modifier

• cell: Transient or persistent decreased platelet or white blood cell counts occur occasionally to frequently in association with the use of Tegretol.