Skin and soft-tissue cysts

Skin and soft-tissue cysts

Milia Small, hard, keratin retention cysts ( Figure 45.11 ) seen both in babies and, after chronic sun exposure, in the elderly as part of Favre–Racouchot syndrome (solar comedones, pseudocysts and leathery , furrowed sun-damaged skin – heightened by smoking). Epidermal cysts These cysts are lined with true stratified squamous epithelium, derived from hair follicle infundibuli or traumatic inclusion. Commonly known as sebaceous cysts, they can occur anywhere. They are fixed to the skin and usually have a central punctum ( Figure 45.12 ). Albert Ludwig Siegmund Neisser , 1855–1916, Director of the Dermatological Institute, Breslau, Germany (now Wroc ł aw , Poland). Maurice Favre , 1876–1954, French dermatologist. Jean Racouchot , 1908–1994, French dermatologist. Heinrich Meibom (Meibomius) , 1638–1700, Professor of Medicine, History and Poetry , Helmstadt, Germany , described these glands in 1666. - ). Treatment depends on the clinical state of the cyst. When inflamed or infected, they should be incised and drained ini - tially; they should be removed later once the inflammation and induration has subsided. It is important to excise the cyst in its entirety as failure to do so usually results in recurrence. Meibomian cysts are epidermal cysts found on the free elid. Trichilemmal (pilar/pilosebaceous) cysts edge of the ey are derived from the epidermis of the external root sheath of ollicle; 90% are found in the scalp and 70% are mul - the hair f tiple. They are usually distinguished from epidermal cysts by pathologists, rather than clinically .

Figure 45.10 Acute infectious purpura fulminans caused by menin

gococcal septicaemia. Note the sharply demarcated necrotic areas distal to the affected end or perforating arteries with surrounding nor

mal skin (courtesy of St John’s Institute for Dermatology, London, UK). Figure 45.11 Milia (courtesy of St John’s Institute for Dermatology, London, UK).

Figure 45.12 Multiple scrotal epidermal cysts (courtesy of St John’s Institute for Dermatology, London, UK).

Skin and soft-tissue cysts

Milia Small, hard, keratin retention cysts ( Figure 45.11 ) seen both in babies and, after chronic sun exposure, in the elderly as part of Favre–Racouchot syndrome (solar comedones, pseudocysts and leathery , furrowed sun-damaged skin – heightened by smoking). Epidermal cysts These cysts are lined with true stratified squamous epithelium, derived from hair follicle infundibuli or traumatic inclusion. Commonly known as sebaceous cysts, they can occur anywhere. They are fixed to the skin and usually have a central punctum ( Figure 45.12 ). Albert Ludwig Siegmund Neisser , 1855–1916, Director of the Dermatological Institute, Breslau, Germany (now Wroc ł aw , Poland). Maurice Favre , 1876–1954, French dermatologist. Jean Racouchot , 1908–1994, French dermatologist. Heinrich Meibom (Meibomius) , 1638–1700, Professor of Medicine, History and Poetry , Helmstadt, Germany , described these glands in 1666. - ). Treatment depends on the clinical state of the cyst. When inflamed or infected, they should be incised and drained ini - tially; they should be removed later once the inflammation and induration has subsided. It is important to excise the cyst in its entirety as failure to do so usually results in recurrence. Meibomian cysts are epidermal cysts found on the free elid. Trichilemmal (pilar/pilosebaceous) cysts edge of the ey are derived from the epidermis of the external root sheath of ollicle; 90% are found in the scalp and 70% are mul - the hair f tiple. They are usually distinguished from epidermal cysts by pathologists, rather than clinically .

Figure 45.10 Acute infectious purpura fulminans caused by menin

gococcal septicaemia. Note the sharply demarcated necrotic areas distal to the affected end or perforating arteries with surrounding nor

mal skin (courtesy of St John’s Institute for Dermatology, London, UK). Figure 45.11 Milia (courtesy of St John’s Institute for Dermatology, London, UK).

Figure 45.12 Multiple scrotal epidermal cysts (courtesy of St John’s Institute for Dermatology, London, UK).

Skin and soft-tissue cysts

Milia Small, hard, keratin retention cysts ( Figure 45.11 ) seen both in babies and, after chronic sun exposure, in the elderly as part of Favre–Racouchot syndrome (solar comedones, pseudocysts and leathery , furrowed sun-damaged skin – heightened by smoking). Epidermal cysts These cysts are lined with true stratified squamous epithelium, derived from hair follicle infundibuli or traumatic inclusion. Commonly known as sebaceous cysts, they can occur anywhere. They are fixed to the skin and usually have a central punctum ( Figure 45.12 ). Albert Ludwig Siegmund Neisser , 1855–1916, Director of the Dermatological Institute, Breslau, Germany (now Wroc ł aw , Poland). Maurice Favre , 1876–1954, French dermatologist. Jean Racouchot , 1908–1994, French dermatologist. Heinrich Meibom (Meibomius) , 1638–1700, Professor of Medicine, History and Poetry , Helmstadt, Germany , described these glands in 1666. - ). Treatment depends on the clinical state of the cyst. When inflamed or infected, they should be incised and drained ini - tially; they should be removed later once the inflammation and induration has subsided. It is important to excise the cyst in its entirety as failure to do so usually results in recurrence. Meibomian cysts are epidermal cysts found on the free elid. Trichilemmal (pilar/pilosebaceous) cysts edge of the ey are derived from the epidermis of the external root sheath of ollicle; 90% are found in the scalp and 70% are mul - the hair f tiple. They are usually distinguished from epidermal cysts by pathologists, rather than clinically .

Figure 45.10 Acute infectious purpura fulminans caused by menin

gococcal septicaemia. Note the sharply demarcated necrotic areas distal to the affected end or perforating arteries with surrounding nor

mal skin (courtesy of St John’s Institute for Dermatology, London, UK). Figure 45.11 Milia (courtesy of St John’s Institute for Dermatology, London, UK).

Figure 45.12 Multiple scrotal epidermal cysts (courtesy of St John’s Institute for Dermatology, London, UK).