12 January 2026
: Case report 
Long-Term Outcome of Isolated Duodenal Transit Bipartition as Initial Metabolic Surgery: A 19-Year Follow-Up Case Report
Unusual clinical course, Educational Purpose (only if useful for a systematic review or synthesis)
Paulo Reis Rizzo Esselin de Melo
ABDEF 1,2,3*, Victor Ramos Mussa Dib EF 4, Carlos Augusto Scussel Madalosso EF 5, Luiz Alfredo Vieira d'Almeida EF 6, Eudes Paiva de Godoy EF 7, Elinton Adami Chaim EF 8, Caio Gustavo Gaspar de Aquino EF 9, Rui José Silva Ribeiro EF 10, Carlos Antonio Madalosso EF 5,11, Hiroji Okano Júnior EF 12, Giorgio Alfredo Pedroso Baretta EF 13, Nicholas Tavares Kruel EF 14, Joe Joaquim Waltrick Junior EF 15, Diogo Swain Kfouri EF 16, Félix Antônio Insaurriaga dos Santos EF 17, Nilton Tokio Kawahara EF 18, Rafael Antoniazzi Abaid EF 19, Fernando de Barros EF 20, Carlos Frota Dillenburg EF 21, José Geraldo Moraes Sampaio Neto EF 1, Ricardo Augusto Martins Bueno da Costa EF 1, Guilherme Spósito Ribeiro Goyano EF 1, Fernando Reis Esselin Melo EF 1,22, Thonya Cruz Braga EF 1,23, Daniel Oscar Caiña EF 24,25, Patrick Noel EF 26,27, Tahir Ebrahim Yunus EF 28, Chetan Parmar EF 29, Ricardo Zorron EF 30, André Teixeira EF 31, Manoel Galvao Neto EF 31, Almino Cardoso Ramos EF 32, Antônio Torres EF 33
DOI: 10.12659/AJCR.950650
Am J Case Rep 2026; 27:e950650
Table 1 Patient characteristics.
| Parameters | Value |
|---|---|
| Initial age | 40 years |
| Current age | 59 years |
| Gender | Female |
| Initial weight | 115 kg |
| Initial body mass index (BMI) | 40.2 kg/m |
| Current weight (after 19 years) | 65 kg |
| Current BMI (after 19 years) | 22 kg/m |
| Excess weight loss (EWL) | 78.7% |
| Initial comorbidities | None |
| Reported complications | Occasional diarrhea, gas |
| Adherence to supplementation | Difficulties with vitamins and proteins |
| Current bowel movement frequency | Twice daily |
| Stool consistency | Normal |