Do you use a capital letter to state the name of condition in middle sentence. For example Deep vein thrombosis or phlebitis?

You're asking about whether to capitalize medical conditions in the middle of a sentence. Here's the breakdown:

General Rule: Medical conditions are not capitalized unless they are at the beginning of a sentence or part of a proper noun.

Examples:

* Correct: "The patient was diagnosed with deep vein thrombosis."

* Correct: "The doctor suspected phlebitis."

* Correct: "The patient's condition was diagnosed as Crohn's disease." (Crohn's disease is a proper noun)

Why?

Medical conditions are generally considered common nouns, similar to "disease" or "illness." Capitalization is reserved for proper nouns (specific names of people, places, or things).

Exceptions:

* Specific syndromes or diseases named after people are capitalized, like "Alzheimer's disease."

* Conditions that are part of a title or heading might be capitalized depending on the style guide.

Let me know if you have more specific scenarios you'd like to discuss!