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Dermatofibrosis Lenticularis (Buschke-Ollendorf Syndrome)
Updated: Jul 2, 2008
Introduction
Background
Buschke-Ollendorff syndrome is a rare hereditary disorder of connective tissue. It is inherited as a pleiotropic autosomal dominant trait with incomplete penetrance. This condition was described for the first in 1902 and was termed "scleroderma adultorum" by Abraham Buschke. Then, Heinrich Ernst Albers-Schönberg described this syndrome in 1915. Finally, Buschke and Helene Ollendorff Curth described it in 1928 in a 41-year-old woman. Buschke-Ollendorff syndrome is considered to be a hamartoma, an association of osteopoikilosis and connective tissue nevi.1,2,3,4,5
Pathophysiology
In the presence of 10% calf serum, cultured fibroblasts of patients with Buschke-Ollendorff syndrome produce 2-8 times more tropoelastin than fibroblasts of healthy individuals. Elastin production is higher in involved and uninvolved skin.6,7,8 Elevated elastin mRNA levels suggest that Buschke-Ollendorff syndrome may result from abnormal regulation of extracellular matrix, leading to increased levels of elastin mRNA and increased accumulation of elastin in the dermis [10]. Noteworthy is that heterozygous loss-of-function mutation in the LEMD3 (LEM domain containing 3) gene (locus 12q14) for an inner nuclear membrane protein has been identified in patients with osteopoikilosis with or without Buschke-Ollendorff syndrome.5,9,10,11
Frequency
International
Buschke-Ollendorff syndrome is rare (1 case per 20,000 population).5
Mortality/Morbidity
The cause of mortality may be malignant transformation of bone densities into osteosarcoma, chondrosarcoma, and giant cell tumor. The otosclerosis with hearing impairment, stenosis of the aortae, and diabetes frequently found in this syndrome make the patient's condition serious.4,12,13
Race
No racial predilection is reported for Buschke-Ollendorff syndrome.5
Sex
The incidence is equal for males and females.5
Age
Skin lesions are visible in neonates just after birth. Other factors of the syndrome are revealed with time.4
Clinical
History
History findings are as follows1,4,5,14,15 :
- The coexistence of cutaneous lesions, such as disseminated lenticular dermatofibrosis, and skeletal changes, such as osteopoikilosis, characterize Buschke-Ollendorff syndrome.
- Cutaneous lesions appear in childhood, often in the first year of life. They may be observed in the fetus. Rarely, they may occur in adulthood.
- They are usually located on the trunk and the proximal extremities, and the skin folds are often involved.
- The lesions are painless, nonpruritic, and enlarge with the growth of the child.
Physical
Physical findings are as follows1,3,4,5,14,15,16,17,18,19,20,21 :
- Buschke-Ollendorff syndrome is an association of disseminated lenticular dermatofibrosis and osteopoikilosis. The dermal lesions are composed of collagen and elastin fibers and, in some instances, mucopolysaccharides. The cutaneous lesions are usually localized on the trunk; in the sacrolumbar region; and, symmetrically, on the extremities. Occasionally, the lesions may be found on the head. They present with slightly elevated and flattened yellowish papules and nodules grouped together forming plaques several centimeters in diameter. The plaques are of irregular shape and sharply demarcated. They are numerous, painless, nonpruritic, and develop over several years. In some individuals, only dermal or osteopoikilosis manifestations may be present.
- Other findings in Buschke-Ollendorff syndrome include nasolacrimal duct obstruction, amblyopia, strabismus, benign lymphoid hyperplasia, hypopigmentation, and short stature.
- The bones demonstrate osteopoikilosis in the stratum spongiosum of the epiphysis and the metaphysis of the long bones, especially in the fingers, the ulna, and the radius. Focal bone densities are often present in the carpal bones, the metacarpal bones, and the phalanges. They also occur in the lumbosacral spine. Each focal area of density may measure from 1-16 mm in length. Other forms of osteosclerosis, including osteopathia striata, melorheostosis, and mixed sclerosis bone dystrophy, may be present.
- Congenital spinal stenosis, disc herniation, clubfoot deformity, and nerve root compression may be present.
- Otosclerosis with or without hearing loss may occur. It is caused by bone resorption and redeposition, and it may be clinically asymptomatic; however, otosclerosis is a rare phenomenon in patients with Buschke-Ollendorff syndrome.
Causes
The syndrome is inherited as an autosomal dominant variant with incomplete penetrance.1,4,5
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References
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Further Reading
Keywords
disseminated lenticular dermatofibrosis, osteopoikilosis, dermatofibrosis lenticularis disseminata with osteopoikilosis, ectodermal dysplasia of connective tissue, osteodermatopoikilosis, osteopathia condensans disseminata
Overview: Dermatofibrosis Lenticularis (Buschke-Ollendorf Syndrome)