How many letters does the top answer for “the presence of blood in the urine; often a symptom of urinary tract disease” have?

The most common answer is haematuria (10 letters).

Crossword clue: the presence of blood in the urine; often a symptom of urinary tract disease

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

haematuria 10 letters wn-def

the presence of blood in the urine; often a symptom of urinary tract disease

hematuria 9 letters wn-def

the presence of blood in the urine; often a symptom of urinary tract disease