title: Sentinel Node Mapping in Melanoma of the Back: SPECT/CT Helps Discriminate "True" and "False" in-Transit Lymph Nodes.
abstract: A 32-year-old man with melanoma on the right paramedian region of the lower back underwent lymphoscintigraphy for radioguided sentinel node (SN) biopsy. Planar imaging showed the presence of 2 sites of radioactivity accumulation corresponding to an axillary SN and to an "in-transit" SN, located on the right side of the upper trunk. A further "hot spot" placed on the left paramedian region of the lower back was identified by planar lymphoscintigraphy. This last finding could be mistaken for another "in-transit" SN, but SPECT/CT demonstrated it was actually a nonspecific radiopharmaceutical accumulation at the level of the right renal pelvis.
authors.affiliation: From the *Regional Center of Nuclear Medicine, University of Pisa Medical School; †Plastic and Reconstructive Surgery Unit, Hospital of Pisa, Pisa; ‡Department of Nuclear Medicine, Santa Maria della Misericordia Hospital, Rovigo, Italy; and §Department of Radiology, University of Southern California, Los Angeles, CA.
authors.forename: Valerio
authors.initials: V
authors.lastname: Duce
authors.forename: Gianpiero
authors.initials: G
authors.lastname: Manca
authors.forename: Sara
authors.initials: S
authors.lastname: Mazzarri
authors.forename: Fulvio
authors.initials: F
authors.lastname: Lorenzetti
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Colletti
authors.forename: Domenico
authors.initials: D
authors.lastname: Rubello
authors.forename: Duccio
authors.initials: D
authors.lastname: Volterrani
mesh_terms: D000328:Adult; D001365:Axilla / Q000000981:diagnostic imaging; D001415:Back / Q000000981:diagnostic imaging; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging; D061305:Lymphoscintigraphy; D008297:Male; D008545:Melanoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D064847:Multimodal Imaging; D021701:Sentinel Lymph Node Biopsy / Q000379:methods; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods