Diagnosis: Fixed drug reaction
Description: Hyperpigmented patches.
Morphology: Hyperpigmentation
Site: Neck side
Sex: M
Age: 37
Type: Clinical
Submitted By: Nameer Al-Sudany
Differential Diagnosis
History: Second day after ingestion of Co-trimoxazole, this patient developed few dark purplish rounded patches on his neck. There was no previous similar history.