There are multiple definitions:

1. intra-abdominal fibromatosis(English)

   • a rare benign neoplasm arising from the abdominal fibrous tissue, mostly in the mesentery. Characterized by a tendency to infiltrate the surrounding vessels and vital structures and recurrence after usually incomplete surgical removal
   • Gastroenterology, Chemotherapy
   • https://doi.org…880010591002215

2. intra-abdominal fat(English)

   • loss of this type of fat implies improvement of insulin sensitivity and seems to be important for the resumption of ovulation in anovulatory women with obesity and infertility
   • TAF
   • Insulin, Adiposity, Pregnancy
   • https://doi.org…00872-0.00016-0

3. idiopathic atrial fibrillation(English)

   • occurring in the absence of established AF risk factors and without overt (or detectable) structural heart disease
   • AF, EF, GLS, PAF, STE, LA, LAVI
   • Cardiology, Electrophysiology
   • https://doi.org…ard.2023.04.024