Table 1.

Key histopathology terms from free-text clinical notes used to classify fibrohistiocytic nodules into the four distinct diagnoses.

Histopathological Diagnosis	Histopathological Diagnosis Extended Terminology
Lymphoid hyperplasia	Benign hyperplastic nodules/Fibrohistiocytic grade 1/Nodular hyperplasia/Lymphoid follicular hyperplasia
Complex hyperplasia	Complex nodular hyperplasia/Fibrohistiocytic grade 2/Nodular hyperplasia complex
Histiocytic sarcoma	Histiocytic/ Histiocytic sarcoma/Fibrohistiocytic grade 3/Malignant histiocytosis (splenic)
Stromal sarcoma	Stromal/Splenic Sarcoma/Sarcoma grade 3