João Gama Marques, MD, MSc, PhD | Psychiatrist.com

Diogenes Syndrome Secondary to Huntington’s Disease

Case Report

Diogenes Syndrome Secondary to Huntington’s Disease

March 2, 2023

Psychiatric symptoms are highly prevalent in neurologic conditions and are a major source of disability and diminished quality of life.

João Gama Marques

Diogenes Syndrome Secondary to Benign Transitional Meningioma

Case Report

Diogenes Syndrome Secondary to Benign Transitional Meningioma

October 13, 2022

In this patient brought to the ED for domestic hoarding and squalor, brain imaging revealed her true diagnosis.

João Gama Marques

Misdiagnosis of Noah Syndrome

Case Report

Misdiagnosis of Noah Syndrome

September 1, 2022

This patient presented with Noah syndrome, secondary to mental retardation complicated by organic psychosis, misdiagnosed as schizophrenia for 25 years.

João Gama Marques

Pellagra With Casal Necklace

Case Report

Pellagra With Casal Necklace

March 10, 2022

Here, read about a homeless man admitted to the psychiatry ED for Capgras syndrome. Casal necklace plus limb extremity skin lesions were clues to the subsequent diagnosis.

João Gama Marques

Case Report

Temporal Lobe Epilepsy Mimicking Schizoaffective Disorder

November 12, 2020

Cavum septi pellucidi (CSP) is significantly more prevalent in individuals with mental illness than in healthy subjects. This report presents 3 cases of CSP and temporal lobe epilepsy-related psychosis...

João Gama Marques

Letter to the Editor

Unconjugated Bilirubin in Schizophrenia

April 23, 2020

In this letter to the editor, Dr Gama Marques discusses the use of unconjugated bilirubin as a biological marker for schizophrenia.

João Gama Marques

Original Research

Organic Psychosis Causing Secondary Schizophrenia

March 12, 2020

Patients with psychosis are too often diagnosed with primary schizophrenia when the psychotic symptoms may actually be the manifestation of neurologic, endocrine, or immunologic disease. Learn about alternate diagnoses...

João Gama Marques

Case Report

Meningioma Causing Secondary Schizophrenia

February 27, 2020

Why in the age of MRIs is a brain tumor mistaken for a psychiatric illness? Here, read about a patient whose first-ever brain scan revealed a meningioma after many...

João Gama Marques

Case Report

Lycanthropy in Neuropsychiatric Patients With Obstructive Sleep Apnea

November 7, 2019

Lycanthropy occurs when an individual believes that he or she is undergoing transformation into a wolf. This report sheds light on its connection with obstructive sleep apnea.

João Gama Marques

Case Report

Psychosis in Autistic Patients Misdiagnosed as Disorganized Schizophrenia

September 12, 2019

Autistic adults may present with splinter skills or schizophrenia-like psychotic disorders, both often confused with disorganized schizophrenia. Read about 2 autistic savant patients for whom neuropsychiatric testing provided the...

João Gama Marques, Sara Pires

Letter to the Editor

Pisa Syndrome Induced by Clozapine and Mirabegron

March 15, 2018

Could the association of mirabegron and clozapine lead to an increase in clozapine levels and thereby cause Pisa syndrome? Read this informative case report to find out more.

Teresa Prior Filipe, João Gama Marques

Letter to the Editor

Paliperidone-Induced Meige Syndrome

January 26, 2017

Meige syndrome is a focal oral facial dystonia involving symmetrical blepharospasm and oromandibular dystonia. The typical symptom of the disorder is difficulty keeping the eyelids open. This report highlights...

João Gama Marques