Morgan examined a seaman of twenty-one, admitted to the Royal Naval Hospital at Hong Kong, whose right mamma, in size and conformation, had the appearance of the well developed breast of a full-grown woman.

It was lobulated and had a large, brown-colored areola; the nipple, however, was of the same size as that on the left breast.

The man stated that he first observed the breast to enlarge at sixteen and a half years; since that time it had steadily increased, but there was no milk at any time from the nipple; the external genital organs were well and fully developed.

He complained of no pain or uneasiness except when in drilling aloft his breast came in contact with the ropes.
Gruger of St.Petersburg divides gynecomazia into three classes:-- (1) That in which the male generative organs are normal; (2) In which they are deformed; (3) In which the anomaly is spurious, the breast being a mass of fat or a new growth.
The same journal quotes an instance (possibly Morgan's case) in a young man of twenty-one with a deep voice, excellent health, and genitals well developed, and who cohabited with his wife regularly.

When sixteen his right breast began to enlarge, a fact that he attributed to the pressure of a rope.