Otitis Externa ESSENTIALS OF DIAGNOSIS Edema and erythema of the external auditory canal (EAC) with debris or thick, purulent discharge. Severe ear pain, worsened by manipulation of the pinna. Periauricular…

Table 36–2. Obtaining and handling samples to diagnose inborn errors. Laboratory studies are almost always needed for the diagnosis of inborn errors. Serum electrolytes and pH should be used to…

Figure 37–1. Normal male and female human karyotype. (Courtesy of the Colorado Genetics Laboratory.) Cell Division Cells undergo cycles of growth and division that are controlled according to their needs…

TREATMENT OF SKIN DISORDERS Topical Therapy Treatment should be simple and aimed at preserving normal skin physiology. Topical therapy is often preferred because medication can be delivered in optimal concentrations…

Figure 33–1. General approach to primary immunodeficiencies. Key clinical patterns can indicate the presence of a PID and the category of immune impairment. Frequency, severity, and age of onset of…

Because the field of immunizations is rapidly changing, it is important for healthcare providers to seek the most cup-to-date information available. The immunization recommendations outlined in this chapter are current…

Disappearance of the anterior vascular capsule of the lens is also helpful in determining gestational age. Until 27–28 weeks’ gestation, the lens capsule is covered by vessels; by 34 weeks,…

DIAGNOSTIC TESTING 1. Electroencephalography Electroencephalography (EEG) is a noninvasive method for recording cerebral activity. The background patterns of the EEG vary by both age and clinical state of the subject,…

ESSENTIALS OF DIAGNOSIS & TYPICAL FEATURES Increased frequency of infections. Ulceration of oral mucosa and gingivitis. Decreased absolute neutrophil count; normal numbers of red cells and platelets. General Considerations Neutropenia…

Centers for Disease Control and Prevention: Youth risk behavior surveillance—United States 2011. MMWR Surveill Summ 2012;61(SS–4) [PMID: 22673000]. Centers for Disease Control and Prevention: Sexual identity, sex of sexual contacts…