Figure 1b. Café au lait spots. (a) Clinical photograph of a 42-year-old woman with NF1 who had abdominal pain from mesenteric and small intestinal neurofibromas shows multiple café au lait spots (black arrows) and sessile cutaneous neurofibromas (white arrow) on the anterior abdomen. (b) Clinical photograph of a 24-year-old man with NF1 and MPNST metastatic to the peritoneal cavity shows a long, oval café au lait spot on his leg.