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Biomedical subjects

J C Barber

Publications and source records attributed to J C Barber.

60 records · Page 4Linked to original sources

Further examples of trisomy-20 mosaicism in amniotic cell cultures.

Amniotic fluid cultures from two patients showed trisomy-20 mosaicism. No trisomy-20 cells were found in a normal full term infant and in multiple tissue biopsies and fetal blood from a fetus after a termination of pregnancy. No definitive advice is yet possible for parents where trisomy-20 amniotic cell mosaicism is detected. Fetoscopy and fetal blood sampling are of no value and termination of pregnancy is not indicated by empirical evidence. Preferential trophoblastic non-disjunction (Kalousek and Dill, 1983) is discussed as a possible partial explanation for the variable occurrence and distribution of this type of mosaicism.

Adult↗

Ocular choristomas.

Choristomas are congenital lesions representing normal tissue(s) in an abnormal location. They are the most common epibulbar and orbital tumors in children. Epibulbar choristomas affect the cornea, limbus or subconjunctival space, and range in appearance from a small, flat lesion to a large mass filling most of the epibulbar region. Astigmatism is often present. Choristomas may be associated with coloboma, Goldenhar syndrome or epidermal nevus syndromes; those associated with the latter are often bilateral and extensive. Choristomas are occasionally familial. Surgery may be indicated to improve vision or cosmesis, or to impede growth. Although choristomas most commonly involve the epibulbar area, they can affect many areas of the eye and orbit, and often affect more than one area.

Astigmatism↗

Vibrio parahaemolyticus endophthalmitis.

A healthy child developed V. parahaemolyticus endophthalmitis after receiving a perforating corneal injury while swimming in the Gulf of Mexico. Peculiar greenish anterior chamber and vitreous exudates were a striking feature of the infection. A history of ocular injury in a salt water environment should alert the clinician to the possibility of infection due to a marine Vibrio, and appropriate means should be employed for the isolation and identification of such organisms.

Cataract↗