Embryology of Breast

Question 1

breast comes from this primary germ layer

Answer 1

ectoderm

Question 2

thickening of ectoderm where breast develop from

Answer 2

milk ridge

Question 3

milk ridge extends from

Answer 3

axilla obliquely to inguinal region

Question 4

milk ridge disappears except

Answer 4

for a small part in the pectoral region

Question 5

the left part of milk ridge thickens, becomes slightly depressed, sends off ____ solid cords

Answer 5

15-20 solid cords

Question 6

the solid cords grow into the

Answer 6

underlying mesenchyme

Question 7

while the underying mesenchyme proliferates,

the depressed ectodermal thickening becomes raised to form the

Answer 7

nipple

Question 8

refers to the presence of an additional nipple alone

Answer 8

polythelia

Question 9

refers to additional mammary glands

Answer 9

polymastia

Question 10

supernumerary nipples occur along a line corresponding to the position of the

Answer 10

milk ridge

Question 11

polythelia are liable to be mistaken for

Answer 11

moles

Question 12

is a failure in the development of the nipple during its later stages.

Answer 12

retracted nipple or inverted nipple

Question 13

retracted nipple/

inverted nipple is important clinically

Answer 13

normal suckling of an infant cannot take place

nipple prone to infection

Question 14

an exessively small breast on one side, resulting from lack of development

Answer 14

micromastia

Question 15

diffuse hypertrophy on one or both breasts

Answer 15

macromastia

Question 16

unilateral or bilateral enlargement of the male breast

Answer 16

gynecomastia