Investigations completed in a 77-year-old ex-smoker presenting with weight loss showed raised CA 19-9 levels. The findings of chest radiograph, abdominal computed tomography (CT) and gastrointestinal endoscopic examinations were all normal. On follow-up, the patient developed left upper lobe collapse on chest radiograph with increasing CA 19-9 levels. Chest CT findings suggested the presence of a left upper lobe tumour. The results of a biopsy of the left upper lobe nodule seen on bronchoscopy suggested a diagnosis of amyloidosis; however, this was not the only diagnosis. The left upper lobe mass comprised a neuroendocrine tumour with amyloid deposition just beneath the bronchial epithelium and focally between the nests of the tumour cells. We report and discuss this uncommon association and presentation.
Case ReportA 77-year-old woman who was an ex-smoker of 40 packyears presented with complaints of weight loss and a decreased appetite. She was known to have mild diverticular disease and experienced a disease flare up with an increased stool frequency of 2-3 bowel movements/day on admission. There was no history of haematochezia, malena, cough, expectoration or haemoptysis. She was known to have bronchial asthma and was receiving treatment with inhaled corticosteroids. On examination, she was not found to have any pallor, clubbing or lymphadenopathy. She had a body mass index of 16. Her heart rate was 80 beats/min and her blood pressure was 130/80 mmHg. The findings of a systemic examination were normal.The initial diagnoses considered included malignancy (possibly gastrointestinal), mal-absorption syndrome and thyroid dysfunction, and investigations were accordingly organised. Other than a serum albumin level of 2.7 g/dL, the patient's biochemical profile was normal. Liver function tests were within the normal range and showed a bilirubin level of 16 umol/L, an alkaline phosphatase level of 92 IU/L and an alanine aminotransferase level of 29 IU/L. A full blood count and thyroid function tests were normal. Chest radiograph findings were normal. Sigmoidoscopy and colonoscopy results were normal other than showing mild diverticular disease. Oesophagogastroduodenoscopy findings were normal, as was the subsequent report of a duodenal biopsy. Tumour marker tests showed that the levels of Carbohydrate Antigen 19-9 (CA 19-9) were raised at 300 ku/L (normal <40 ku/L). The tests were subsequently repeated, and the CA 19-9 level was found to be 326 ku/L. The Carcinoembryonic Antigen, Alpha-fetoprotein and Cancer Antigen 125 levels were normal. Ultrasound and subsequent computed tomography (CT) of the abdomen and pelvis were normal. The diarrhoea resolved, and the patient was feeling better. A dietary opinion was sought, and the patient was started on nutritional supplements. She was discharged three weeks from admission, as nothing specific was found, with plans to follow up with repeat CA 19-9 level measurements.Two months after discharge the patient was again admitted, as her symptoms of anorexia and weight lo...