It's normal for newborn babies (boys and girls) to have mild or even swollen, enlarged breasts and/or lumps under the nipple. They are almost always benign and due to exposure to maternal hormones. Hi, Breast cancer in adolescent males is virtually unheard fatmonsterfilms.comr,teenage boys going through puberty commonly develop a tender lump under the nipple of one or both breasts. This condition is called “gynecomastia.”caused by hormone changes during puberty, is . Breast lumps in boys are common during SMR 3 and SMR 4. In boys, SMR 3 usually begins at about age 12 or 13 years and lasts a year or so, although it can be normal in our culture to begin as early as 10 years or as late as years, according to Tanner (Journal of Pediatrics, ; ).
Lump in breast of adolescent boy. Common Questions and Answers about Lump in breast of adolescent boy. The firm lump may occur under only one nipple, under both nipples, or under the two at different rates or sizes. The lumps are often tender when they are growing the fastest. Hi, Breast cancer in adolescent males is virtually unheard of. However,teenage boys going through puberty commonly develop a tender lump under the nipple of one lump on breast in boys