Pityriasis rubra pilaris, also known as trichophytosis rubra, is a dermatological disease caused by fungal infections, which is characterized by lesions of the skin and scalp. The main causative agent of this disease is fungi of the genus *Trichophyton* and *Microsporum*. The disease manifests itself in the form of clearly defined scaly spots, which can be accompanied by itching and inflammation. Pityriasis rubra pilaris is often observed in children and adolescents, but adults are also at risk. Since this disease causes significant psychoemotional stress due to changes in appearance, early diagnosis and adequate treatment play an important role in improving the patient's quality of life.
History of the disease and interesting historical facts
The history of pityriasis versicolor goes back to ancient times, with references to similar diseases found in the works of famous ancient physicians such as Halo and Avicenna. In the Middle Ages, it was widely believed that diseases such as trichophytosis rubra were caused by evil spirits. Although the fungal nature of the disease was established with the development of science, some aspects of the history of lichen show that attention to hygienic conditions and psychosomatic factors also played a significant role in its treatment. Modern research has shown that different cultures had different approaches to treatment, including the use of herbal infusions and rituals, which indicates the importance of this disease in the perception of public health.
Epidemiology
According to WHO, the incidence of pityriasis versicolor varies between 2-3% among the population in regions with a temperate climate and reaches up to 30% in tropical regions. A high prevalence rate is observed among children, especially aged 5 to 14 years, which is associated with increased contact with interlocutors and poor hygiene. In Russia, in recent years, more than 1,000 cases per year have been registered, indicating the need for gradual research and control of this disease. Epidemiological studies also show that the incidence varies depending on geographic location, living conditions and access to medical care.
Genetic predisposition to this disease
Currently, research shows that there is a genetic predisposition to tinea versicolor. The main genes associated with susceptibility to fungal infections are genes that regulate the immune response, such as *TLR2*, *IL-1*, and *IL-6*. Mutations in these genes can lead to decreased immune function, which increases the likelihood of developing tinea. In addition, a study of polymorphisms in these genes in patients with tinea versicolor has revealed certain associations, which confirms the need for further study of genetic factors that affect susceptibility to this disease.
Risk factors for the development of this disease
There are a number of risk factors that contribute to the development of pityriasis versicolor, including:
- Physical factors: age (mainly children and adolescents), gender (more often in boys), endocrine and metabolic disorders.
- Chemical factors: contact with chemicals such as alkaline or acidic solutions that can destroy the skin's protective barrier.
- Immune conditions: Immunodeficiencies such as HIV/AIDS or the use of immunosuppressants, which also increases the risk of infections.
- Hygienic conditions: poor hygiene conditions, high levels of contact with other patients.
- Social factors: living in overcrowded conditions, lack of access to medical services for diagnosis and treatment.
Diagnosis of this disease
Diagnosis of pityriasis rubra pilaris relies on multiple approaches, including:
- The main symptoms are the appearance of clearly defined flaky patches, hair loss in the affected area and itching.
- Laboratory tests: Microscopic examination of hair and skin samples to detect fungi.
- Radiological examinations: Ultrasound of the skin may be used to assess the extent of lesions.
- Other types of diagnostics: PCR methods for identifying genetic markers of pathogens.
- Differential diagnosis: it is necessary to exclude other dermatological diseases such as seborrheic dermatitis and psoriasis.
Treatment
Treatment of pityriasis versicolor involves a comprehensive approach, which includes:
- General treatment: improving the immune response through proper nutrition and giving up bad habits.
- Pharmacological treatment: antifungal drugs such as terbinafine and itraconazole.
- Surgical treatment: In cases of deep and extensive infections, hair removal from the affected areas may be required.
- Other treatments: Topical antiseptics and antihistamines may be prescribed to reduce itching.
List of medications used to treat this disease
The list of the most effective antifungal drugs includes:
- Terbinafine
- Itraconazole
- Fluconazole
- clotrimazole
- Ketoconazole
Disease monitoring
Monitoring of patients with pityriasis rubra pilaris includes the following strategy:
- Control stages: regular examinations by a dermatologist to assess the effectiveness of treatment and the progress of recovery.
- Prognosis: Most patients are reliably cured, but prevention of relapse is necessary.
- Complications: In rare cases, secondary skin infection and psychological impact on the patient may occur.
Age-related features of the disease
Pityriasis rubra pilaris presents differently in different age groups. In children, it is one of the most common dermatological diseases, while in adults it is usually less common. In older people, the disease often has a more complicated course, which may be due to a weakened immune system and comorbidities. Age variability also leads to differences in clinical presentation, which must be taken into account when choosing treatment methods.
Questions and Answers
- What is pityriasis versicolor? It is a fungal infection that affects the skin and hair, causing characteristic flaky patches.
- What are the main symptoms of this disease? The main symptoms include the appearance of clearly defined, flaky areas on the skin, itching and hair loss.
- How is the disease diagnosed? Diagnosis includes clinical examination, laboratory tests, microscopy and PCR to identify pathogens.
- What is the prognosis for the disease? With timely treatment, most patients experience significant improvement, but may have a risk of relapse.
- What treatment is used to control this infection? Treatment includes antifungal medications, topical agents, and in rare cases, surgery.
