Fallopian tubes
General
Normal anatomy / histology

Author: Nicole Riddle, M.D. (see Authors page)
Editor: Jamie Shutter, M.D.

Revised: 28 July 2017, last major update March 2013

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Fallopian tubes [title] "Normal anatomy histology"

Cite this page: Normal anatomy / histology. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/fallopiantubesnormal.html. Accessed December 14th, 2017.
Definition / general
  • Also known as oviducts, uterine tubes, salpinges (singular salpinx means 'trumpet')
  • Named after their discoverer, the 16th century Italian anatomist Gabriele Falloppio
Diagrams / tables

Images hosted on other server

Fallopian tube

Gross description
  • Hollow, tubular structures, bilateral, 8 - 12 cm long and 0.5 - 1.2 cm in diameter, lined by a single layer of mucosal epithelium with many folds (plica)
  • Extends from posterior superior uterine fundus laterally and leads to ovaries
  • Connected to broad ligament by mesosalpinx (double fold of peritoneum), to uterine cornu by utero ovarian ligament, to lateral pelvic sidewall by infundibulopelvic (suspensory) ligament
  • Arterial supply from branches of uterine and ovarian arteries, located within mesosalpinx
  • Nerve supply from both sympathetic and parasympathetic fibers
  • Sensory fibers run from T11 - T12 and L1
  • Lymphatic drainage to para aortic, internal iliac, external iliac, common iliac and inguinal nodes
  • Segments: intramural (within wall of uterus), isthmus (thick walled, narrower opening, ~ 2 cm in length), ampulla (thin walled, major portion of lateral tube, typically where fertilization occurs), infundibulum (trumpet shaped end lined by fimbriae, attaches to ovary)
  • Tubal ostium: opening to peritoneal cavity
  • Uterotubal junction: entrance to uterine cavity
Gross images

Images hosted on other servers:

Uterine attachment on upper left, fibriae on upper right

Microscopic (histologic) description
  • Plica: delicate folds of mucosa on inner aspect of tube, most evident in ampulla, merge with fimbriae
  • Mucosa: consists predominately of single layer of cells including:
    • Ciliated columnar cells (~25%), most abundant in infundibulum and ampulla, estrogen increases production of cilia
    • Secretory cells (~60%), nonciliated, contain apical granules and produce tubular fluid, progesterone increases their number while estrogen increases their height and secretory activity
    • Intercalated cells (peg cells, < 10%), which may be inactive secretory cells
  • Tubal fluid:
    • Contains nutrients for spermatozoa, oocytes and zygotes and promotes the capacitation of sperm by removing glycoproteins and other molecules from the plasma membrane
    • Major constituents are calcium, sodium, chloride, glucose, proteins, bicarbonates, amylase, lactic acid
    • Bicarbonates and lactic acid are vital to sperm's use of oxygen; also help egg develop postfertilization
    • Tubal fluid flows against action of cilia; i.e. toward the fimbriated end
  • Formation of fallopian tubal fluid: see Reproduction 2001;121:339
  • Muscle layer: 3 smooth muscle layers:
    • Innermost - obliquely arranged
    • Middle - circular
    • Outermost - longitudinal, extends into fimbriae
  • Serosal surface: mesothelium of visceral peritoneum
  • Stroma:
    • Resembles fibroblasts, whorled / storiform pattern, surrounded by dense reticulin network
    • Positive for SMA and desmin
  • Normal histologic variations:
    • Intramuscular edema in 12.5% of specimens, most frequently in postpartum women
    • Plical fibrosis (35.5%), epithelial vacuolization (6.6%), and epithelial tufting / stratification (3.5%) correlated with increased patient age
    • Inflammatory cells are common; intramuscular mast cells (~70% of cases), plasma cells (~20%), neutrophils (10.5%), and lymphoid follicles (2.1%) (Arch Pathol Lab Med 2002;126:951)
Microscopic (histologic) images

Images hosted on PathOut servers

Lumen

Tubal epithelium



Images hosted on other servers

Lumenal center filled with plica surrounded by smooth muscle layers of alternating orientation

Fimbriae are not thickened

Simple columnar epithelium consisting largely of secretory cells and scattered ciliated cells

Various images