Case Report
Refractory Paraneoplastic Diarrhea Secondary to Adenocarcinoma of the Lung: A Case Report and Literature Review
| Patient’s stool studies | Normal values in parenthesis |
| Infectious disease | Stool leukocytes | No PMNs | Stool culture | Vibrio-negative | Salmonella-negative | Campylobacter-negative | Shigella-negative | Clostridium difficile toxin PCR assay | Negative | Parasitic studies | Ova and parasites screen | Negative | Cryptosporidium/Giardia | Negative | Endocrine studies | 5-HIAA, 24-hour urine | 4.7 (<8 mg/24 hours) | ACTH | 18.8 (6.0-59 pg/mL) | Cortisol (p.m.) | 9.3 (2.0-14.0 ug/dL) | Calcitonin | 229 (<7.6 pg/mL) | Chromogranin-A | 152 (<92 ng/mL) | Gastrin | 52 (0-180 pg/mL) | Serotonin | 131 (<230 ng/mL) | Somatostatin | 9 (up to 25 pg/mL) | VIP, plasma | Undetectable |
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Key: HIAA = 5-hydroxyindoleacetic acid, VIP = vasoactive intestinal peptide.
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