Can you precise your question ?

Do you mean illnesses whose causes are not known ?

Thank you very much@Aida Cancel.

Thank you very much@Aida Ce. I would like to know its answer.

My question is 'are there any mental illness which has not been researched in literature yet?

You may want to look at culture-bound syndromes in the DSM Article Culture-bound Syndrome: Has it Found its Right Niche?

thanks a lot.

The attached coding update shows clearly that the diagnostic process is in a rapid flow, especially with respect to neurodegenerative illness and disease.

Its better to check the list which is standardized either see DSM or ICD.

By the word"not known" I think you are referring to less common disorders because if something is unknown to all of us, how can we name it?

You may see the list of Cultural Bound Syndromes, you may find something interesting and less studied.

Or if you are looking something with cultural specification then check Chinese Classification System for mental disorders as well.

Thank you very much.

One of my hobbies are mimickers of mental illness!!! My favorite book is "Psychological Masquerade" by Robert Taylor MD. My Master's Dissertation was about people who talk to the dead, see the dead, channeling, metaphysics, voodoo, Wicca, Espiritismo, etc. and whether or not they would be labeled psychotic by mental health professionals, when that isn't the case. Traditionally, Bipolar Depression isn't properly diagnosed for about 15 years, it is mistaken for anxiety and depression so polypharmacy is used as well as inappropriate medications. I could go on and on, great question. Again, my hobby and lots of fun to research i.e. mimickers of mental illness.

Just a cursory reflection: Not that the DSM Personality Disorders group needs additional nomenclature, but the syndromal effects of alcohol on personality often present as a distinctive psychosocial dysfunction — “Residual Alcohol Personality Disorder.” This is especially evident within family structure. The central dynamic may manifest as a complex interaction of resentment, rejection & cutting personal verbal attacks, with verbal or even physically abusive manifestation. If a legitimate category, this may result from impulse dysregulation due to specific neural damage from EToH toxicity over time.

Two thoughts off- the-cuff:

l have often wished that the Inadequate Personality Disorder dx had not been discarded as I believe that the thought in the jettisoning was that patients with these traits could be partially subsumed under Borderline PD. I have found that BPD doesn't always quite capture a number of such patients.

Some scholars think that Dependent Personality is a disorder that unfairly stigmatizes women who have been acculturated to be affiliative. The corollary to this notion is that there should be a corresponding "disorder" (Hyperindependent PD?) to earmark males (primarily) who exhibit the opposite set of traits ( eg, not asking for help when it is needed, etc)

Mental health research is in perpetual forward motion, constantly evolving. I'm currently working on ethnographic influences within the PTSD setting. PTSD in my experience tends to have a high degree of 'modern world' perspective which distorts diagnosis, evaluation and subsequent treatment.

Rare Mental Disorders

1) Stendhal Syndrome

2) Apotemnophilia

3) Alien Hand Syndrome

4) Capgras Syndrome

5) Alice in Wonderland Syndrome

Best Regards Esma Biroglu

musical hallucinosis (read about it, I ask my patients if they can change the channel, they can but then it returns back to the same thing again). This is due to dopamine issues and a specific part of the brain, read up on it if interested.

angelman's syndrome often mistaken for aspergers or autism

They need to add to the DSM the following:

--Schizophrenia, paranoid type with bipolar I (manic/depression)

--Schizophrenia with Bipolar I (manic/depression)

--Schizophrenia with Bipolar II (hypomania/depression)

--Schizophrenia paranoid type with Bipolar II (hypomania/depression)

--I think I have some type of body dysmorphia i.e. I think I am thinner than I am (until I see photos of myself!!!!) there should be a dx for this maybe social media/photographic body dysmorphic disorder

Frontal Lobe Syndrome (sexual inappropriate type) is often misunderstood as deviant perverts when actually it is from brain changes due to trauma, dementia, strokes, etc. not predatory behavior,, etc.

Frontal Lobe Syndrome (unmotivated type) people are called, lazy, unmotivated, not wanting to get help, etc. when the brain doesn't allow them to plan and follow through with complex and/or basic tasks.

Lycanthropy is a hallucinatory syndrome of metamorphosis in an animal similar to the wolf or other animal species (snake, bird, dog... or an indetermined animal). Although it is interpreted as a secondary delirium to a serious mental disorder, this phenomenon has relevant connections with the cultural and mythological aspects of society.

See:

https://doi.org/10.1046/j.1600-0447.2003.00243.x