To the Editor.— Robertson (217:1553, 1971) in a husband and wife, and Bauman (217:1300, 1971) in stepbrothers raised in the same household, have recorded the contemporaneous occurrence of familial melanoma in nonblood-related individuals. These reports raise the question of coincidental association contagion (Marshall,218:1831, 1971). We have recently encountered this association in a husband and wife who had been married and living together for 47 years. Patient 1 was a 73-year-old man seen for evaluation of a lesion of the left chest wall of one year's duration. Three weeks prior to the first visit, he noticed a nodule in the corresponding axilla, where a purplish, papillary lesion arose from the edge of a nevus, 1.5 cm in size, in the area of the left breast. There was a palpable node, 3 cm in size, at the base of the left axilla. A presumptive diagnosis of melanoma was