The cause of stomach carcinoma is still unclear but a variety of possible factors are presently under investigation. The clinical signs of stomach carcinoma are deceitful, and the disease is mainly asymptomatic. The first symptoms are dyspeptic disturbances, the feeling of satiety after meals, belching, and loss of appetite. This interesting and educative case starts with an almost classical story of a patient admitted with hyperemesis during pregnancy. She was a primipara, 18 years old, with a significantly low body mass index and electrolyte imbalance and at the 23rd week of gestation.