Acromicric dysplasia

Acromicric dysplasia is a rare skeletal disorder characterized by severe short stature, short hands and feet, and mild facial dysmorphism. The condition is caused by mutations in the FBN1 gene (fibrillin-1), which plays a critical role in the formation of extracellular matrix microfibrils. Acromicric dysplasia belongs to a spectrum of acromelic dysplasias that also includes geleophysic dysplasia and Weill-Marchesani syndrome, all of which can result from specific mutations in FBN1 affecting the TGF-beta signaling pathway. Key clinical features include proportionate short stature that becomes apparent in childhood, with adult height typically ranging from 130 to 150 cm. Affected individuals have characteristically short, stubby hands and feet (brachydactyly) with cone-shaped epiphyses visible on X-ray. Facial features may include a round face, well-defined eyebrows, long eyelashes, a small nose with anteverted nostrils, a long philtrum, and thick lips. Joint limitations, particularly of the hands and wrists, are common and may worsen over time. Mild skin thickening on the hands and forearms, as well as hoarse voice, have also been reported. Internal organ involvement is generally mild compared to geleophysic dysplasia, though some patients may develop mild cardiac valve abnormalities or recurrent respiratory issues related to tracheal narrowing. There is currently no specific cure or targeted therapy for acromicric dysplasia. Management is supportive and multidisciplinary, focusing on orthopedic monitoring, management of joint stiffness through physical therapy, and surveillance for potential cardiac or respiratory complications. Growth hormone therapy has been attempted in some cases but generally shows limited efficacy. Carpal tunnel syndrome may develop and require surgical intervention. Regular follow-up with specialists in genetics, orthopedics, cardiology, and pulmonology is recommended to monitor for complications and optimize quality of life.

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