modpathol20188 - 31 S2 - MAGN.pdf (10.87 MB)
Extraadrenal plexiform infiltration in mature ganglioneuromas are predictive of gonadal type steroidogenesis and interstitial Leydig cells
journal contribution
posted on 2018-03-28, 18:49 authored by Salvador J. Diaz-CanoSalvador J. Diaz-Cano, Fatima Al-HashimiBackground:
Mature adrenal ganglioneuromas (MAGNs) are benign neoplasms of the
combined neural crest, schwannian, and connective tissue origin, rarely
occurring in the adrenal glands. This study presents the phenotypic and
hormonal spectrum of these preoperatively challenging neoplasms.
Design:
Demographic, diagnostic, surgical, and pathologic findings of patients
who were adrenalectomized as a result of MAGN were retrospectively
reviewed from the database of a tertiary referral hospital. Clinical
data, as well as followup data, were collected retrospectively. All the
patients received operative resection.
Results:
A total of 36 MAGN (24 males, 12 females) were retrieved. Mean age was
39.6 years (range 25–72). Thirty (83.3%) were asymptomatic, four (11.1%)
complained of abdominal discomfort, and two (5.6%) had abdominal
distension. Mean size of the tumors was 7.23 cm (range, 2.515 cm,
twentyfour were larger than 5 cm). There was no recurrence, during a
mean followup of 6.5 years (range, 110 years). A whorled appearance
corresponding to interlacing bundles of Schwann cells and collagen
fibers on histologic specimens was visualized in twelve tumors on T1
and T2weighted images. Tumors with markedly high signal intensity on
T2weighted images consisted histologically of a
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significant amount of myxoid stroma and relatively few cellular and
fibrous components. Tumors with intermediate to high signal intensity
consisted of numerous cellular and fibrous components and little myxoid
stroma.
The extraadrenal extension was seen in 9 (6 males, three females) with a
multifocal perivascular plexiform appearance and dystrophic
calcification. These neoplasms were associated with gonadal type urinary
steroid profile in women and interstitial Leydig cells.
Conclusion:
Preoperative diagnosis of MAGNs remains difficult, in particular, those
neoplasms with extraadrenal extension. The presence in extraadrenal
neoplasms of dystrophic calcification, lobulated plexiform appearances,
and gonadal type steroid in young females suggest the presence of Leydig
cells, which is usually overlooked in males. A complete resection
should be recommended once malignancy cannot be entirely excluded by
preoperative analyses.