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Biomedical subjects

N F Yuan

Publications and source records attributed to N F Yuan.

9 recordsLinked to original sources
PubMed1994

[Management of the A-pattern deviation with overacting superior oblique muscle].

The overacting superior oblique muscle is usually associated with A-pattern ocular deviation. 10 such cases (14 eyes), 9 exotropic and 1 esotropic, were performed superior oblique tenotomy with horizontal and vertical corrective surgery; they all attained postoperative normal ocular alignment in the primary position. The A-pattern deviation was corrected and overaction of the superior oblique improved. The authors point out that in the absence of binocular vision and abnormal retinal correspondence, superior oblique tenotomy is a safe and useful procedure for patients with 20 delta and over of A-pattern deviation.

Adolescent↗
PubMed1993

[Congenital esotropia].

Congenital esotropia is a common type of strabismus that occurs shortly after birth, though the ophthalmologist is seldom consulted at an early date. We conducted a retrospective study of 7 children of congenital esotropia who were diagnosed before the age of 6 months and underwent bilateral medial recti recession (6-7 mm) when 1.5 to 3 years old. Postoperatively, 5 patients attained normal ocular alignment (< 10 prism diopters), and 2 were undercorrected to need a second operation. The differential diagnosis and treatment of congenital esotropia were discussed.

Child, Preschool↗
PubMed1990

[Diagnosis and treatment of inferior oblique muscle paresis].

The authors report 12 cases of isolated inferior oblique muscle paresis which is very uncommon and mostly of congenital origin, though trauma is also cause. The clinical features, differential diagnosis and treatment of the disease are discussed. Inferior oblique palsy is differentiated from contralateral inferior rectus palsy by Park's 3-step test, and from Brown's syndrome by forced duction test and the overaction of the antagonist superior oblique during version. Surgical procedures include shortening and advancement of the inferior oblique muscle, recession of the contralateral superior rectus and shortening of the contralateral inferior rectus muscle, and tenotomy of the ipsilateral superior oblique.

Adolescent↗
PubMed1989

[Meibomian gland adenocarcinoma with regional lymph node metastasis].

Meibomian gland carcinoma of the eyelid is a common neoplasm which clinically simulates a benign condition of chalazion. Although growing slowly, metastasis to regional lymph nodes is frequent, at a rate of 17-28% in this country. Eleven (11) cases of Meibomian gland carcinoma with regional lymph node metastasis are reported, and the therapeutic modalities have been tailored to suit the individual cases, including full-thickness local excision, orbital exenteration, radical cervical dissection, and superficial parotidectomy.

Adult↗
PubMed1989

[Squamous cell carcinoma of the conjunctiva].

Squamous cell carcinoma of the conjunctiva is the most frequent nonpigmented malignant conjunctival tumor and often misdiagnosed. Chronic unilateral keratoconjunctivitis should be biopsied to rule out malignancy. The authors report 11 cases treated by complete excision with biopsy. 7 cases were followed up 3 months to 7 years without relapse. Beta-irradiation is recommended for cases suspected of incomplete excision. The incidence, pathological classification, diagnosis, differential diagnosis, treatment and lymphatic metastasis of the disease have been discussed and the significance of periodical follow-up emphasized.

Aged↗