Microthrombi are found in the blood vessels associated with the infarcts.Following the acute changes there is an invasion of lipid phagocytes and degeneration of adjacent neural fibres with vascular hyperplasia at the edges of the infarcts. The lipid phagocytes are later replaced by a cellular reaction of astrocytes. Vessels in surrounding areas remain patent but are collagenised. Distribution of spinal cord lesions may be related to vascular supply. There is still uncertainty regarding the aetiology of decompression sickness damage to the spinal cord.Dysbaric osteonecrosis lesions are typically bilateral and usually occur at both ends of the femur and at the proximal end of the humerus Symptoms are usually only present when a joint surface is involved, which typically does not occur until a long time after the causative exposure to a hyperbaric environment. The initial damage is attributed to the formation of bubbles, and one episode can be sufficient, however incidence is sporadic and generally associated with relatively long periods of hyperbaric exposure and aetiology is uncertain. Early identification of lesions by radiography is not possible, but over time areas of radiographic opacity develop in association with the damaged bone. Diagnosis
Diagnosis of decompression sickness relies almost entirely on clinical presentation, as there are no laboratory tests that can incontrovertibly confirm or reject the diagnosis.
Zarah may refer to:

Zarah (television personality), a Filipino-American, also a singer
Zarah Garde-Wilson (born 1978), Australian solicitor
Zarah Ghahramani (born 1981), Iranian-born author living in Australia
Zarah Leander (1907 – 1981), Swedish actress and singer
Zarah, or Ich weiss, es wird einmal ein Wunder geschehen, a song by Nina Hagen
Fort Zarah

See also
Zahra (name)
Zara (disambiguation)
Zaraah Abrahams, English actress