Lung biopsy is not part of the routine diagnostic workup of tropical pulmonary eosinophilia. Diagnostic workup is often coordinated by a treating neurologist. Most simple cysts are benign and do not require any treatment or further diagnostic workup. If the full diagnostic workup is completely normal, patient observation is recommended. History and physical examination are central to the diagnostic workup in nephrology. For sporadic Western cases, careful diagnostic workup including searching for underlying sexual conflict is common. The diagnosis is often one of exclusion found during the workup of delayed puberty. However, those who develop a stroke require further workup to identify the etiology. The ER workup reveals a bloody pleural effusion. Only a small percentage of infants will have a sepsis workup done. After the history and physical exam, clinicians may move on to laboratory workup and imaging. Thus, isolated yields measured after standard aqueous workup and chromatographic purification should seldom exceed 94%. The size of the proximal aorta should be evaluated carefully during the workup. Recognition of the disease requires a high index of suspicion and an extensive workup. Thiourea is also used in the reductive workup of ozonolysis to give carbonyl compounds.