Pilonice disease of the sacrococcygeal region

Piloniomyoma (also known as pilonidal sinus disease) in the sacral region is increasingly common in specialized treatment facilities. Piloniomyomas are skin depressions in the groove between the buttocks with hair inside. Patients are typically between the ages of 15 and 30.

According to a proctologist, piloerection (abscess or sacrococcygeal fistula) is a type of cyst containing hair, skin, and debris, which can become secondarily infected in the gluteal groove or sacrococcygeal region. Sacrococcygeal piloerection is a condition where hair follicles become infected, and the cause can be congenital or acquired.

The "mechanism" behind hair growth in the sacral region may be due to the movement of the buttocks creating a suction force that draws the hair deep into the skin. However, there is also a view that it is due to the friction between the buttocks and the cutting force in the buttock crease causing the hair to penetrate deep into the skin; or due to hair breakage, shedding, and accumulation in the buttock crease…

The incidence of new cases of piloerection in the sacrococcygeal region is 26/100,000; it is most common in the 15-30 age group (due to the effect of sex hormones on hair follicles), and less common in people over 40 years old.

Pilonium can recur and become complicated, causing inflammation. It's important to differentiate pilonium from hidradenitis (often associated with pilonium), anal fistula, syphilitic granuloma; osteomyelitis of the sacrum with skin fistula; presacral cysts, etc. Many cases of perianal pilonium sinuses resemble anal fistulas. High-risk factors associated with pilonium include: obesity, poor hygiene; a history of folliculitis or boils in other areas of the body; and hirsutism.

Doctors note that piloerection is becoming increasingly common; treatment methods vary depending on the condition, but it is prone to wound infection and recurrence.

Source: https://thanhnien.vn/benh-to-long-vung-cung-cut-185251021200412941.htm