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This study evaluated the incidence and risk factors of ER for PHEO within 30 days of adrenalectomy.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>A retrospective analysis of 346 patients\u2009&gt;\u200918 years with unilateral PHEO who underwent adrenalectomy between September 2012 and September 2024. The patients were categorised into ER (<jats:italic>n<\/jats:italic>\u2009=\u200949) and no ER (<jats:italic>n<\/jats:italic>\u2009=\u2009297) groups. Logistic regression analyses were performed to predict risk factors for ER.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>The most common causes of ER were postoperative maintained hypotension (42.9%), bleeding (6.1%), ileus (24.5%), wound infection (4.1%), hyperkalemia (8.2%), pneumonia (2%), intra-abdominal abscess (2%), acute MI (4.1%), and colonic injury (6.1%). Most postoperative complications were Clavien-Dindo grade II (<jats:italic>n<\/jats:italic>\u2009=\u200940, 81.6%). Two perioperative deaths (4%) occurred in the ER group. Logistic regression showed that low body mass index (OR 0.849, 95% CI, 0.748\u20130.964; <jats:italic>p<\/jats:italic>\u2009=\u20090.012), tumor size\u2009&lt;\u20095\u00a0cm (OR 0.096, 95% CI, 0.030\u20130.310; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), and low ASA (OR 0.435, 95% CI, 0.249\u20130.761; <jats:italic>p<\/jats:italic>\u2009=\u20090.003) were associated with risk reduction for ER while malignancy (OR 5.302, 95% CI, 1.214\u201323.164; <jats:italic>p<\/jats:italic>\u2009=\u20090.027), open approach(OR 12.247, 95% CI, 5.227\u201328.694; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), and intraoperative complications (OR 19.149, 95% CI, 7.091\u201351.710; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) were associated with risk increase of ER.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>Postoperatively maintained hypotension and ileus were the most common causes of ER. Low body mass index, tumour size\u2009&lt;\u20095\u00a0cm, and low ASA were risk reductions for ER, while malignancy, open approach, and intraoperative complications were the independent risk increase factors.\n<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s00423-025-03719-3","type":"journal-article","created":{"date-parts":[[2025,5,8]],"date-time":"2025-05-08T03:45:04Z","timestamp":1746675904000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Early readmission after adrenalectomy for pheochromocytoma. A retrospective study"],"prefix":"10.1007","volume":"410","author":[{"given":"Tamer A. A. M.","family":"Habeeb","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abd Al-Kareem","family":"Elias","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdelmonem A. 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