Nasal glial heterotopia refers to congenital malformations of displaced normal, mature glial tissue, which are no longer in continuity with an intracranial component. This is distinctly different from an encephalocele, which is a herniation of brain tissue and/or leptomeninges, that develops through a defect in the skull, where there is a continuity with the cranial cavity. Signs and symptoms
Patients come to clinical attention early in life (usually at birth or within the first few months), with a firm subcutaneous nodule at bridge of nose, or as a polypoid mass within the nasal cavity, or somewhere along the upper border of the nasal bow. If the patient presents with an intranasal mass, there may be obstruction, chronic rhinosinusitis, or nasal drainage. If there is a concurrent cerebrospinal fluid (CSF) leak, then an encephalocele is much more likely.This lesion is separated into two types based on the anatomic site of presentation: 

Extranasal (60%):  Subcutaneous bridge of nose
Intranasal (30%):  Superior nasal cavity
Mixed (10%): Subcutaneous tissues and nasal cavity (larger lesions)

Pathology
The cut surface shows a smooth, homogeneous glistening to slippery cut surface, showing an appearance similar to brain. Sometimes, it is quite firm, especially when there is a large amount of associated fibrosis. The lesions are usually <2 cm in greatest dimension. The overlying skin or squamous mucosa is intact and uninvolved by the process. There is normal glial tissue set within a fibrous connective tissue stroma. There is such blending, that the underlying process may be difficult to detect without special studies.
In medicine, confusion is the quality or state of being bewildered or unclear. The term "acute mental confusion" is often used interchangeably with delirium in the International Statistical Classification of Diseases and Related Health Problems and the Medical Subject Headings publications to describe the pathology. These refer to the loss of orientation, or the ability to place oneself correctly in the world by time, location and personal identity. Mental confusion is sometimes accompanied by disordered consciousness (the loss of linear thinking) and memory loss (the inability to correctly recall previous events or learn new material). Etymology
The word confusion derives from the Latin word, confundo, which means "confuse, mix, blend, pour together, disorder, embroil." Causes
Confusion may result from drug side effects or from a relatively sudden brain dysfunction. Acute confusion is often called delirium (or "acute confusional state"), although delirium often includes a much broader array of disorders than simple confusion. These disorders include the inability to focus attention; various impairments in awareness, and temporal or spatial dis-orientation. Mental confusion can result from chronic organic brain pathologies, such as dementia, as well. Other
Differential diagnosis
The most common causes of drug induced acute confusion are dopaminergic drugs (used for the treatment of Parkinsons disease), diuretics, tricyclic, tetracyclic antidepressants and benzodiazepines or alcohol. The elderly, and especially those with pre-existing dementia, are most at risk for drug induced acute confusional states. New research is finding a link between vitamin D deficiency and cognitive impairment (which includes "foggy brain").