Chondrodysplasia Punctata

Chondrodysplasia punctata (CDP) encompasses a group of genetically heterogeneous disorders characterized by abnormal cartilage calcification, most notably observed as stippling on radiographs of the epiphyses. The underlying pathophysiology varies depending on the specific genetic defect, affecting different metabolic pathways involved in cholesterol biosynthesis, vitamin K metabolism, or peroxisomal function. Clinical manifestations are diverse, ranging from severe, lethal forms with profound skeletal abnormalities and organ involvement to milder forms with isolated skeletal findings. Diagnosis relies on radiographic evidence of stippling, genetic testing to identify causative mutations, and biochemical assays to assess relevant metabolic pathways. Management is primarily supportive, focusing on addressing specific complications such as limb deformities, cataracts, and respiratory issues. Prognosis varies significantly depending on the underlying genetic etiology and the severity of clinical manifestations.