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Vol. 43. Issue 2.
Pages 73-78 (March - April 2024)
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Vol. 43. Issue 2.
Pages 73-78 (March - April 2024)
Original Article
Detection of internal mammary chain infiltration in breast cancer patients by [18F]FDG PET/MRI. Therapy implications
Detección de la infiltración de la cadena mamaria interna en pacientes con cáncer de mama mediante PET/RM con 18F-FDG y sus implicaciones terapéuticas
J.R. Garcia
Corresponding author

Corresponding author.
, M. Kauak, A. Compte, P. Bassa, E. Llinares, E. Valls, E. Riera
CETIR ASCIRES Grupo Biomédico, Esplugues de Llobregat, Barcelona, Spain
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Table 1. Presence of an afferent vessel (axillary and internal mammary chain) in relation to age and TNM staging in the 41 patients studied.

To evaluate the detection rate and therapeutic implication of the infiltration of the internal mammary chain (IMCI) by [18F]FDG PET/MRI for staging of patients with breast cancer.


Prospective study including 41 women with breast cancer (stage ≥ IIB) staged by [18F]FDG PET/MR. Two-phase exam: breast imaging (prone), whole-body (supine).

TNM stage assessed by peer consensus with Nuclear Medicine and Radiology specialists. Study of the afferent vessel (AV) to IMC by breast MRI. IMCI was correlated with age, AV-IMC, T stage, breast quadrants, axillary and distant infiltration.

Therapeutic re-evaluation by a multidisciplinary committee.


IMCI detection rate of 34% (14/41), with 8/14 patients under 55 years of age. All 14 patients with IMCI showed AV-IMC, 6 of them (43.9%) without VA-axillary. Of 27/41 patients without IMCI, in 13 (48.1%) only AV-axillary was found, in the remaining 14 (51.9%), AV-axillary and AV-IMC was found.

In 57% (8/14) tumours were multicentric and 42% (6/14) focal, in inner quadrants in 4/6 (66.7%).

In 1/14 patient (7.1%) only IMCI was found, in 9/14 (64.3%) axillary and IMC, in 4/14 patients (28.6%) distant lesions were detected.

Committee re-evaluation: no further treatment in 27/41 patients (65.8%), thoracic radiotherapy in 10/41 patients (24.4%), systemic therapy in 4/41 patients (9.7%).


Our detection rate of IMCI in breast cancer staging by [18F]FDG PET/MR was 34%.

Related factors were age, multicentric tumours, inner quadrants, detection of AV-IMC, NM staging.

The evidence of IMCI allowed tailored therapy, with thoracic radiotherapy implementation in 24.4% of patients.

Internal mammary chain
Breast cancer
Afferent vessel

Evaluar la tasa de detección y la implicación terapéutica de la infiltración de la cadena mamaria interna (ICMI) mediante 18F-PET/RM en la estadificación de pacientes con cáncer de mama.


Estudio prospectivo, 41 mujeres con cáncer de mama (estadio ≥ IIB) estadificadas mediante 18F-FDG-PET/RM. Estudio en dos fases: Imágenes mamarias (decúbito prono), cuerpo completo (supino).

Estadificación TNM por consenso entre especialista en Medicina Nuclear y Radiología. Estudio vaso aferente (VA) a CMI por RM mamaria. Correlación ICMI con: edad, VA-CMI, estadificación T, cuadrante, infiltración axilar y a distancia.

Re-valoración terapéutica en comité multidisciplinar.


Tasa de detección de ICMN del 34% (14/41), siendo 8/14 < 55 años. Todas las 14 pacientes con ICMI muestran VA-CMI, en 6 de ellas (43,9%) sin VA-axilar. De 27/41 pacientes sin ICMI en 13 (48,1%) sólo VA-axilar, en los 14 restantes (51,9%) VA-axilar y VA-CMI.

El 57% (8/14) son multicéntricos y 42% (6/14) focales, en cuadrantes internos en 4/6 (66,7%).

En 1/14 paciente (7,1%) sólo ICMI, en 9/14 (64,3%) axilar y CMI, en 4/14 pacientes (28,6%) lesiones a distancia.

Decisión del comité: sin tratamiento adicionale en 27/41 pacientes (65,8%), radioterapia torácica en 10/41 pacientes (24,4%), terapia sistémica en 4/41 pacientes (9,7%).


La tasa de detección de la ICMI en la estadificación del cáncer de mama mediante 18F-FDG PET/RM es del 34%.

Son factores asociados la edad, los tumores multicéntricos, los de cuadrantes internos, la existencia de VA- CMI, la estadificación NM.

La evidencia de ICMI permite la individualización de la terapia, indicando la radioterapia torácica en el 24,4%.

Palabras clave:
Cadena mamaria interna
Cáncer de mama
Vaso aferente
PET/RM con 18F-FDG


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