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PALENCIA. NOVIEMBRE 2007
REUNIÓN CIENTIFICA S.E.A.P Ernesto García Ureta
http://www.garciaureta.com/
Mujer de 50 años.
Sin antecedentes personales ni familiares de interés.
Nódulo de 6,5 cm en mama izquierda
Sospecha clínica y radiológica de fibroadenoma.
Se realiza PAAF.
Discreta/escasa celularidad
Células Ductales Normales
Células Fusiformes
sin graves desviaciones morfologicaas.
Fragmentos Estromales Densos
Vuitch MF, Rosen PP, Erlandson RA.
Pseudoangiomatous hyperplasia of mammary stroma.
Hum Pathol. 1986;17:185-91.
Grossly circumscribed, nonhemorrhagic breast masses consisting of mammary stromal 
proliferations that simulated vascular lesions were studied in nine women. Histologically, a 
striking pattern, which appeared to consist of complex inter-anastomosing channels lined by 
slender spindle cells, was present in the mammary parenchyma. The importance of this benign 
lesion, referred to as pseudoangiomatous hyperplasia of mammary stroma, is its distinction 
from angiosarcoma. The patients ranged in age from 22 to 52 years; all were premenopausal. 
Each presented with a palpable unilateral mass, measuring up to 7 cm in diameter. The 
patients were treated by excisional biopsy and remained well for up to 2.5 years after excision. 
One patient had two local recurrences within one year of the original excision, and a second 
patient had a local recurrence at 14 months. No patient had another concurrent or 
metachronous malignant tumor of the breast or other organ, and no abnormal hormonal status 
was found. Complete local excision appears to be adequate treatment. It remains to be 
determined whether this is a neoplastic process. However, there is no evidence that it is a 
precursor of angiosarcoma, and ultrastructural observations demonstrate that the spaces 
found in the lesion are not true vascular channels. Rather, they appear to arise by a process 
that involves disruption and separation of stromal collagen fibers. Since small foci of this 
change are common in hyperplastic breast tissue from premenopausal women, it is likely that 
the development of a discrete tumor with this pattern represents an exaggerated form of 
stromal hyperplasia.
Aron M et al
Indian J Pathol Microbiol. 2005 ;48:260-4.
Ng WK et al
Acta Cytol. 2003 ;47:373-80.
Vicandi B et al
Acta Cytol. 1998 ;42:335-41.
Spitz Dj et al
Diagn Cytopathol. 1999 ;20:323-4.
Lui PC et al.
Diagn Cytopathol. 2004 ;30:353-5.
Virk RK
Arch Pathol Lab Med. 2010 ;134:1070-4.
Levine PH
Diagn Cytopathol. 2005 Jun;32(6):345-50
Ernesto García Ureta
http://www.garciaureta.com/

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PAAF reveals benign breast nodule findings

  • 1. PALENCIA. NOVIEMBRE 2007 REUNIÓN CIENTIFICA S.E.A.P Ernesto García Ureta http://www.garciaureta.com/
  • 2. Mujer de 50 años. Sin antecedentes personales ni familiares de interés. Nódulo de 6,5 cm en mama izquierda Sospecha clínica y radiológica de fibroadenoma. Se realiza PAAF.
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  • 9. Discreta/escasa celularidad Células Ductales Normales Células Fusiformes sin graves desviaciones morfologicaas. Fragmentos Estromales Densos
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  • 15. Vuitch MF, Rosen PP, Erlandson RA. Pseudoangiomatous hyperplasia of mammary stroma. Hum Pathol. 1986;17:185-91. Grossly circumscribed, nonhemorrhagic breast masses consisting of mammary stromal  proliferations that simulated vascular lesions were studied in nine women. Histologically, a  striking pattern, which appeared to consist of complex inter-anastomosing channels lined by  slender spindle cells, was present in the mammary parenchyma. The importance of this benign  lesion, referred to as pseudoangiomatous hyperplasia of mammary stroma, is its distinction  from angiosarcoma. The patients ranged in age from 22 to 52 years; all were premenopausal.  Each presented with a palpable unilateral mass, measuring up to 7 cm in diameter. The  patients were treated by excisional biopsy and remained well for up to 2.5 years after excision.  One patient had two local recurrences within one year of the original excision, and a second  patient had a local recurrence at 14 months. No patient had another concurrent or  metachronous malignant tumor of the breast or other organ, and no abnormal hormonal status  was found. Complete local excision appears to be adequate treatment. It remains to be  determined whether this is a neoplastic process. However, there is no evidence that it is a  precursor of angiosarcoma, and ultrastructural observations demonstrate that the spaces  found in the lesion are not true vascular channels. Rather, they appear to arise by a process  that involves disruption and separation of stromal collagen fibers. Since small foci of this  change are common in hyperplastic breast tissue from premenopausal women, it is likely that  the development of a discrete tumor with this pattern represents an exaggerated form of  stromal hyperplasia.
  • 16. Aron M et al Indian J Pathol Microbiol. 2005 ;48:260-4. Ng WK et al Acta Cytol. 2003 ;47:373-80. Vicandi B et al Acta Cytol. 1998 ;42:335-41. Spitz Dj et al Diagn Cytopathol. 1999 ;20:323-4. Lui PC et al. Diagn Cytopathol. 2004 ;30:353-5. Virk RK Arch Pathol Lab Med. 2010 ;134:1070-4. Levine PH Diagn Cytopathol. 2005 Jun;32(6):345-50