Some of these include:

single-photon emission computed tomography (SPECT)
positron emission tomography (PET)
functional magnetic resonance imaging (fMRI)United States medical and mental health professionals follow the Diagnostic and Statistical Manual of Mental Disorders (DSM) of the American Psychiatric Association; the International Classification of Diseases (ICD) published by the World Health Organisation (WHO) is often used by health professionals elsewhere. Until recently ADHD in adults was considered as a continuation of child-onset ADHD. It is now established, however, that also an adult-onset version exists. In a large longitudinal study from 2015 it was found that 28 of the 31 persons who had an ADHD-diagnosis at the age of 38 never had received an ADHD-diagnosis when tested at the ages of 11, 13 and 15. Treatment
As a first step, adults with ADHD should receive psychoeducation about ADHD, so they understand the diagnosis. This is vital to ensure that adults with ADHD can make informed decisions about their treatment, and has other benefits such as improved relationships with others. Treatment often begins with medication selected to address the symptoms of ADHD, along with any comorbid conditions that may be present. Medication alone, while sometimes effective in correcting the physiological symptoms of ADHD, will not address the paucity of skills which many adults will have acquired because of their ADHD (e.g., one might regain ability to focus with medication, but skills such as organizing, prioritizing and effectively communicating have taken others time to cultivate).
An imperforate lacrimal punctum is a congenital disorder of dogs involving the lack of an opening to the nasolacrimal duct (tear duct) in the conjunctiva. Dogs normally have two lacrimal puncta, the superior and inferior. This condition can affect either or both. Symptoms include excessive tearing and tear staining of the hair around the eye. Affected breeds include the American Cocker Spaniel, Bedlington Terrier, Golden Retriever, Poodle, and Samoyed. Imperforate lacrimal puncta can be corrected by surgical opening of the punctum. See also
Congenital lacrimal duct obstruction


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