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Case report
Pheochromocytoma and gastrointestinal stromal tumours in an adult neurofibromatosis type 1 patient: a rare co-occurrence
  1. Nuttawut Vongsumran1,
  2. Sarawut Kongkarnka2,
  3. Pittaporn Watanawittawas1,3 and
  4. Worapaka Manosroi1
  1. 1Endocrine and Metabolism Unit, Internal Medicine Department, Faculty of Medicine, Chiang Mai University, Muang Chiang Mai, Chiang Mai, Thailand
  2. 2Department of Pathology, Faculty of Medicine, Chiang Mai University, Muang Chiang Mai, Chiang Mai, Thailand
  3. 3Endocrine and Metabolism Unit, Sriphat Medical Center, Faculty of Medicine, Chiang Mai University, Muang Chiang Mai, Chiang Mai, Thailand
  1. Correspondence to Worapaka Manosroi; worapaka.m{at}


The risk of tumours including pheochromocytoma and gastrointestinal stromal tumour (GIST) has been reported to be higher in neurofibromatosis type 1 (NF1) patients. The concomitant occurrence of these two tumours was rare in NF1 patient and most were symptomatic. In this case report, we describe the case of a 47-year-old man with NF1 who presented with microscopic haematuria. Neither hypertension nor any gastrointestinal symptoms were reported by the patient. While investigating for haematuria, left adrenal mass and arterial enhancing lesions in the small bowel were incidentally documented during computerised urography. The patient subsequently underwent a left adrenalectomy and small bowel resection. The pheochromocytoma and multiple GIST tumours were diagnosed based on pathology. Here, we discuss the rare association of pheochromocytoma and GIST and the asymptomatic presentation of those tumours in an NF1 patient. We further suggest that in NF1 patients a heightened level of vigilance can help identify this infrequent combination.

  • adrenal disorders
  • small intestine cancer

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  • Contributors NV conducted the literature review, designed and wrote the first draft of the manuscript. SK provided the pathological report and wrote the manuscript. PW conducted the literature review and edited the manuscript. WM was responsible for planning the case, conceived the original idea, conducted literature review and provided critical revision of the manuscript for important intellectual content. All the authors have read and approved the final version of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.