Prenatal diagnosis of proximal femoral focal deficiency: A case report and literature review

Proximal Focal Femoral Deficiency: Prenatal Diagnosis of a Rare Congenital Skeletal Anomaly

A rare case of proximal focal femoral deficiency (PFFD) is presented due to concerns for a short fetal femur. A 32-year-old patient (G3P2002) was reviewed at 37 weeks of gestation. Sonography revealed an appropriately maturing female fetus, with a left femoral diaphyseal length of 36.1 mm (<1st percentile), while the right measured 71.4 mm (35th percentile). The proximal epiphysis, head, and trochanter of the left fetal femur were absent on 3D sonography, with significant overlap of the femur on the pubic bone. At delivery, the baby weighed 3240 g, with a lower limb-length discrepancy of 56 mm. A radiograph confirmed left-sided hypoplastic proximal femur, absent femoral head, and a poorly formed acetabulum. The baby was conservatively managed, with plans for possible surgery and limb prosthesis. A high index of suspicion and capacity building to facilitate prenatal diagnosis are essential for optimal care of babies with PFFD.

Unilateral Isolated Proximal Femoral Focal Deficiency in an Egyptian Infant and Review of Literature

Proximal femoral focal deficiency (PFFD) is a rare congenital anomaly of the femur ranging from mild shortening to total agenesis. If left untreated, it could lead to impaired child growth, abnormal gait, vertebral abnormalities, cosmetic problems, and behavioral changes. We report on an Egyptian female, presenting to us at the age of 15 days with a short left lower limb. Both upper limbs and the right lower limb were normal and she was not dysmorphic. The skeletal survey showed an isolated short left femur. At the age of 11 months, clinical reexamination confirmed left femur shortening. Echocardiogram and abdominal sonography revealed no abnormality. Magnetic resonance imaging (MRI) of the pelvis and lower limbs revealed isolated left proximal femoral focal deficiency. Her developmental milestones were normal. She was referred to pediatric orthopaedics for early intervention and proper management. To our knowledge and after reviewing the literature, this patient represents the first case of unilateral isolated proximal focal femoral deficiency in Egypt. In conclusion, PFFD diagnosis needs a systemic skeletal–facial–genital phenotyping to differentiate from overlapping genetic disorders. Early diagnosis and radioimaging are highly important for proper management.

Fetal ultrasound: Early diagnosis and natural evolution of proximal femoral focal deficiency

Proximal femoral focal deficiency is an extremely rare congenital anomaly with only a few case reports in the literature. This case illustrates one diagnosed by prenatal ultrasound. The diagnosis may be isolated or associated with other abnormalities and syndromes. This report describes the early obstetrical ultrasound diagnosis, its evolution and associated findings throughout pregnancy. To the best of our knowledge, it is the first report associating this diagnosis with sickle cell trait. Another finding in our patient was a concomitant intrauterine growth restriction that we attribute to placental infarctions and a retro placental hemorrhage, also on the basis of sickle cell trait. At birth, placental weight was under the 10^th percentile for gestational age. Obstetrical ultrasound in the prenatal diagnosis of proximal femoral focal deficiency is important, because early recognition of this malformation could provide useful information to parents and physicians regarding newborn management and therapeutic planning.

Postaxial limb hypoplasia (PALH): the classification, clinical features, and related developmental biology

Postaxial limb hypoplasia (PALH) is a group of nonhereditary diseases with congenital lower limb deficiency affecting the fibular ray, including fibular hemimelia, proximal femoral focal deficiency, and tarsal coalition. The etiology and the developmental biology of the anomaly are still not fully understood. Here, we review the previous classification systems, present the clinical features, and discuss the developmental biology of PALH.

Prenatal diagnosis of proximal focal femoral deficiency: Literature review of prenatal sonographic findings

Proximal focal femoral deficiency (PFFD) is a rare musculoskeletal malformation that occurs in 0.11-0.2 per 10,000 live births. This congenital anomaly involves the pelvis and proximal femur with widely variable manifestations, from mild femoral shortening and hypoplasia to the absence of any functional femur and acetabular aplasia. Prenatal diagnosis of PFFD is still a challenge, but early recognition of this malformation could provide useful information to both parents and physicians concerning management and therapeutic planning. For this review, we analyzed all the cases of prenatally diagnosed PFFD that were reported in the literature from 1990 to 2014 and provide a description of the most common prenatal sonographic findings.