Variable clinical presentations of secondary delusional infestation: an experience of six cases from a psychodermatology clinic

Review of literature and clinical practice experience for the therapeutic management of Morgellons disease

Morgellons disease (MD) is a rare and contentious health condition characterized by dermatological symptoms including slow-healing skin lesions 'attributed' to fibres emerging from or under the skin. Patients also report sensations of crawling, biting and infestation with inanimate objects. This review examines the aetiology, patient characteristics, epidemiology, historical context, correlation with Lyme disease, role of internet, impact on quality of life and treatment approaches for MD. Despite ongoing debate, MD is not officially recognized in medical classifications, with differing views on its aetiology. Some link MD to Lyme disease, while others view it as a variant of delusional infestation. The literature suggests both psychiatric and environmental factors may contribute. The manuscript explores the association with substance abuse, psychiatric comorbidities, infectious agents and the role of internet communities in shaping perceptions. MD's impact on quality of life is significant, yet often overlooked. Treatment approaches are varied due to limited evidence, with low-dose antipsychotics being considered effective, but patient beliefs may influence adherence. A patient-centred, multidisciplinary approach is emphasized, considering both the physical and psychological dimensions of MD. Addressing the controversies surrounding MD while focusing on patient well-being remains a critical challenge for healthcare professionals.

Multidisciplinary and Holistic Models of Care for Patients With Dermatologic Disease and Psychosocial Comorbidity: A Systematic Review

Importance

Psychocutaneous disease affects an underrecognized patient population facing misdiagnosis and a reduced quality of life due to knowledge gaps and insufficient awareness. Clinicians worldwide serve as pioneers in offering specialized care for affected patients through the development of combined clinics. Results yield a framework needed to expand availability and ultimately improve patient outcomes.

Objectives

To report key findings generated from an in-depth analysis of available literature, highlight the importance and benefits of providing multidisciplinary care, and provide structural evidence of existing liaison clinics for more widespread future application.

Evidence Review

To identify data from inception to November 12, 2019, a search was conducted in PubMed and Google Scholar using the following search strategy: psychodermatology clinic OR psychodermatology liaison OR psychodermatology combined OR psychocutaneous clinic OR psychocutaneous liaison OR psychocutaneous combined OR psychiatry dermatology combined OR psychiatry dermatology clinic. Studies were excluded if they were single-patient case reports; if information regarding the number of patients, clinic setup, and presenting conditions was not provided; and if the reports were published in a language other than English.

Findings

A total of 932 studies were screened, and 23 were retained after removal of duplicates and application of inclusion criteria. The combined clinics, varying in structure, design, and setting, provided collective data from 1677 patients in 12 countries worldwide. Results indicate that patients experience barriers in gaining access to care and clinicians lack appropriate knowledge and resources for proper diagnosis and treatment. The implementation of combined clinics provides a cost-reducing avenue in the management of dermatologic disease and psychosocial comorbidity by limiting inaccurate diagnoses, ineffective treatments, unnecessary referrals, and "doctor shopping." Increased patient satisfaction or improved patient outcomes after the use of holistic treatment with pharmacologic and nonpharmacologic therapies was reported by 20 included studies (87%).

Conclusions and Relevance

Examined data from the included clinics illuminate the increased need and demand for specialized care. The ability to provide high-quality integrative patient care, potential utility in medical education, and findings of reduced health care expenditures reflect the need for health care leaders to expand specialized care as key for moving forward. Practical clinic models consist of a well-informed dermatologist for identification of psychocutaneous disease, referral if needed, and treatment based on the physician's individual comfort level. Involvement of multiple specialists, including psychiatrists, psychologists, and residents and preferably within teaching institutions, in consultations and management-related discussions is recommended.

Current Understanding and Approach to Delusional Infestation

Delusional infestation is a psychiatric condition defined by a fixed belief of infestation despite contrary evidence. Diagnosis includes exclusion of organic etiologies. Treatment with antipsychotics is effective and safe in the majority of patients. Patients are characteristically reluctant to pursue psychiatric evaluation and may resist discussing their disease in psychiatric terms. Strategies to strengthen the provider-patient therapeutic alliance facilitate communication around appropriate treatment. Without antipsychotic medications, patients can become heavy utilizers of care and practice self-destructive behaviors in attempts to clear their perceived infestation.

Reframing delusional infestation: perspectives on unresolved puzzles

Delusional infestation (DI), a debilitating psychocutaneous condition, featured as a false fixed belief of being infested accompanied by somatosensory abnormality, behavior alteration, and cognitive impairment. Although management of primary causes and pharmacotherapy with antipsychotics and/or antidepressants can help to alleviate symptoms in most patients, the underlying etiology of DI still remains unclear. Morgellons disease (MD), characterized by the presence of cutaneous filaments projected from or embedded in skin, is also a polemic issue because of its relationship with spirochetal infection. This review aims to discuss the following topics that currently confuse our understandings of DI: 1) the relationship of real/sham “infestation” with DI/MD; 2) behavior alterations, such as self-inflicted trauma; 3) neuroimaging abnormality and disturbance in neurotransmitter systems; and 4) impaired insight in patients with this disease. In discussion, we try to propose a multifactorial approach to the final diagnosis of DI/MD. Future studies exploring the neurobiological etiology of DI/MD are warranted.

History of Morgellons disease: from delusion to definition

Morgellons disease (MD) is a skin condition characterized by the presence of multicolored filaments that lie under, are embedded in, or project from skin. Although the condition may have a longer history, disease matching the above description was first reported in the US in 2002. Since that time, the condition that we know as MD has become a polemic topic. Because individuals afflicted with the disease may have crawling or stinging sensations and sometimes believe they have an insect or parasite infestation, most medical practitioners consider MD a purely delusional disorder. Clinical studies supporting the hypothesis that MD is exclusively delusional in origin have considerable methodological flaws and often neglect the fact that mental disorders can result from underlying somatic illness. In contrast, rigorous experimental investigations show that this skin affliction results from a physiological response to the presence of an infectious agent. Recent studies from that point of view show an association between MD and spirochetal infection in humans, cattle, and dogs. These investigations have determined that the cutaneous filaments are not implanted textile fibers, but are composed of the cellular proteins keratin and collagen and result from overproduction of these filaments in response to spirochetal infection. Further studies of the genetics, pathogenesis, and treatment of MD are warranted.

Information, consent and treatment of patients with Morgellons disease: an ethical perspective

Morgellons is a medically contested diagnosis with foremost dermatological symptoms. Patients experience fibers emerging from the skin, together with a range of other somatic, psychiatric, and neurological complaints. Within the medical community, it is generally held to be a variation of delusional parasitosis/delusional infestation, which is usually treated with antipsychotics. Little attention has been paid in the literature to the ethical aspects of treating patients with Morgellons disease. The communicative strategies suggested in the literature display significant ethical issues, primarily the use of therapeutic privilege, i.e. withholding information from the patient. Since this limits patient autonomy, that approach is ethically problematic. Instead, the physician has an ethical obligation to respect the patient's autonomy, provide full information, and seek consent before initiating a psychiatric referral.