The World Health Organization defines cerebrovascular diseases as rapidly developing clinical signs of focal cerebral dysfunction that last for more than 24 hours or lead to death without the presence of an apparent cause other than cerebrovascular malformations.
Fournier's gangrene was first identified in 1883, when the French venereologist Jean Alfred Fournier described a series in which five previously healthy young men suffered from a rapidly progressive gangrene of the penis and scrotum without an apparent cause.
Pleural effusions due to congestive heart failure (CHF) typically are transudates, but an occasional patient with CHF is found to have an exudate in the absence of an apparent cause other than CHF.
The peculiar feature in CNFs was the discontinuity and rather uniform dispersion of turbostratic domains within the amorphous carbon, an apparent cause of crack pinning, and crack path deflection, thus strengthening/toughening.
Students, like psychiatric patients, have intermittent sleeping patterns, an apparent cause of the exploding head feeling.
A primary pneumothorax is one that occurs without an apparent cause and in the absence of significant lung disease, while a secondary pneumothorax occurs in the presence of existing lung pathology.
By definition, it refers to death in an infant less than 1 year of age when rigorous postmortem analysis fails to reveal an apparent cause.
There were 4 patients that developed protein losing nephropathy (PLN) without an apparent cause, one of which had concurrent hypertension.
Unexplained or idiopathic causes of SIADH account for a relatively small proportion of all cases of SIADH, and the numbers of patients in whom an apparent cause cannot be established after consistent follow-up over time are relatively few.
Of these patients, 18 suffered from persistent or recurrent LBP without an apparent cause on conventional scans and diagnostics ('persistent pain' group) at a variable time-point after operation (range 9 to 76 months, mean 24.9 months, median 23 months).
