Two separate human liver aldehyde dehydrogenases exist which show differences in substrate specificity, cation inhibition or activation, and molecular weight. In this paper we report a common absence of enzyme 2 in Chinese which may be taken to indicate a gene deletion coding for this enzyme. The possible implication of thie gene deletion among Chinese is discussed.

Acute thyroid abscess is rare, however this report describes the case of a 71-year-old male with an acute thyroid abscess resulting from oesophageal perforation who was successfully treated with antibiotic (cefotaxime sodium), neck exploration and a right subtotal thyroidectomy. The patient reported ingesting a fish bone and, although this had been dislodged, he experienced continuing pharyngalgia and fever. An anterior neck swelling with tenderness and erythema was noted at the level of the right thyroid. At operation, the recurrent laryngeal nerve was identified and preserved, and a large part of the right thyroid was excised. During the 5-year follow-up period, deglutition function and thyroid function tests remained normal. This result indicates that early administration of antibiotic, and surgical treatment of the infection source and affected thyroid tissue are critical for a successful outcome and the prevention of severe complications.

A rare electrophoretic variant of superoxide dismutase (SOD) was found in one Filipino of 146 Filipinos, 1382 Malaysians and 816 Indonesians examined. The variant consists of two usual bands and two slower migrating bands similar to those reported earlier. Superoxide dismutase variants are common among people of certain localized regions in Europe, however, this is the first report of such a variant occurring in people of non-European origin.