MedGen

A short femur length is defined as either a measurement below the 2.5th percentile for gestational age or a measurement that is less than 0.9 of that predicted by the measured biparietal diameter. The femur should be measured with the bone perpendicular to the ultrasound beam and with epiphyseal cartilages visible but not included in the measurement (PMID:16100637). [from HPO]

Positioning of the antitragus at an angle perpendicular to the plane of the ear (oriented away from the plane of the ear). [from HPO]

A short humerus length is defined as a length below the 2.5th percentile for gestational age or as a measurement less than 0.9 of that predicted by the measured biparietal diameter. The humerus should be measured with the bone perpendicular to the ultrasound beam and with epiphyseal cartilages visible but not included in the measurement (PMID:16100637). [from HPO]

Posterior curving of the antihelix from its origin at the antitragus, traveling initially almost perpendicular to the descending helix and obscuring some of the concha. [from HPO]

An abnormal horizontal axis orientation of the crus of the helix. That is, the main axis of the crus of the helix is perpendicular to the medial longitudinal axis of the ear, instead of sloping inferoposteriorly. [from HPO]

A benign tumor made up of mostly myofibroblasts that appears almost exclusively on the digits of the hands and feet, rarely involving the thumb or big toe. The lesion displays a proliferation of bland intradermal spindle cells arranged in whorls, fascicles, or a storiform pattern in a collagenous background of varying degrees. Also usually present are perpendicular tumor cell fascicles that extend to the epidermis. The small intracytoplasmic inclusions are said to appear similar to red blood cells. The inclusion bodies have been shown to be made up of densely packed vimentin and actin filaments. The tumor often causes a dome-shaped elevation of the overlying structures, forming a protuberant or polypoid nodule. The overlying epidermis can display a host of changes, including acanthosis, hyperkeratosis, parakeratosis, rete ridge flattening, entrapment of adnexal structures, and, rarely, ulceration. [from HPO]

This midline cranial cleft usually occurs with a midline facial cleft that completes a median craniofacial dysraphia. A broad nasal root and bifid nose are associated with orbital hypertelorism and a median frontal encephalocele. The frontal bone abnormality varies from a minor flattening to a large midline defect. There is an increased distance between the olfactory grooves. The crista galli is widened, duplicated, or in some cases absent. Marked inferior prolapse of the enlarged ethmoid bone occurs with orbital hypertelorism. The severe orbital hypertelorism is associated with a broad flattening of the glabella and extreme lateral displacement of the inner canthi. The periorbita, including the eyelids and eyebrows, are otherwise normal. A long midline projection of the frontal hairline marks the superior extent of the soft tissue features of this midline cranial cleft. The median frontal defect delineates the region through which the frontal encephalocele herniates. The lateral segments of the frontal bone sweep upward from the region of the intact glabella and are flattened laterally. No pneumatization of the frontal sinus is evident. The crista galli and the perpendicular plate of the ethmoid are bifid. Just as the ethmoid, including the cribriform plate, is widened and caudally displaced, the sphenoid sinus is broadened and extensively, but symmetrically pneumatized. The lateral rotation of the greater and lesser wings of the sphenoid results in a relative shortening of the anteroposterior dimension of the middle cranial fossa. The floor of the anterior cranial fossa is upslanting from its medial aspect to its lateral aspect, with a harlequin appearance on the coronal scan. [from HPO]