The infant's head is enlarging, but the doctor observes that the fontanelles are not bulging, and the infant is intact, neurologically speaking; s/he has no symptoms, i.e., is neither irritable, nor unusually sleepy -- then, follow carefully. In the Case of Macrocephally, How Is The Diagnosis of Hydrocephalus Typically Made? Presentation "The various types of hydrocephalus can present differently in different age groups."