Case contributed by Dr Mohammad Taghi Niknejad


Known case of alkaptonuria.

Patient Data

Age: 40 years
Gender: Male

On spine radiographs, there is multi level intervertebral disc calcification with disc space narrowing. Mild chondrocalcinosis also is noted at auricle and nasal cartilages.

Case Discussion

The findings in a patient with known alkaptonuria are consistent with ochronosis. The term ochronosis usually refers to the bluish black discoloration of certain tissues, such as the ear cartilage and the ocular tissue, seen with alkaptonuria.

A case of Prof. Saeed Rad, Tabriz, Iran.​

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