Neoplasms

Skin and Connective Tissue Diseases

All Conditions

Symptoms and General Pathology

Rare Diseases

Melanoma

Pigmentation Disorders

Neuroendocrine Tumors

Neuroectodermal Tumors

Neuroectodermal Tumors, Primitive

Neoplasms, Germ Cell and Embryonal

Neoplasms by Histologic Type

Neoplasms, Nerve Tissue

Nevus, Pigmented

Nevus

Nevi and Melanomas

Skin Neoplasms

Skin Diseases

Neuroendocrine Tumor

Neuroepithelioma

* fPAM imaging will be performed prior to scheduled excision. The time to excision will not be extended longer than 2 weeks for imaging purposes.
* When the participant presents for imaging, the area of the thickest lesion depth will be determined by fPAM. The area of deepest thickness will be marked perpendicular to the longest axis of the lesions and a clinical photo will be taken and placed in the image storage database.
* Surgical excision will be performed as standard of care and fPAM depth will be compared with histological examination.
* To image CTCs in cutaneous blood vessels, a small cuticle area on a finger will be imaged (Single cell PAM imaging) and the most distal cutaneous metastasis or metastasis of largest diameter will be imaged

-Hybrid imaging technique that detects absorbed diffusive protons ultrasonically through the photoacoustic effect.

Functional photoacoustic microscopy

Standard of care surgical excision

Single cell photoacoustic microscopy

Lynn Cornelius, M.D.

The investigators propose the use of functional photoacoustic microscopy (fPAM) to evaluate both benign and malignant pigmented lesions for tumor depth. Through fPAM analysis followed by histological examination, the investigators anticipate that they will be able to non-invasively determine tumor depth of pigmented lesions (moles and melanoma). In melanoma, tumor depth (Breslow's depth) is not only an important prognostic indicator, but also directs surgical treatment. The ultimate goal is to develop a sensitive clinical tool that will allow non-surgical evaluation of pigmented lesions, which eventually, will aid in melanoma diagnosis and management - potentially an earlier and more definitive surgical management.

In addition, the investigators propose to use the combination of fPAM and single-cell PAM to respectively image CTCs in trunk vessels and cuticle capillaries. Based on the investigators' murine models, the investigators anticipate that they will be able to differentiate CTCs from other blood cells and reliably calculate CTC concentration in a non-invasive manner. CTC concentration has been demonstrated to be a valuable indicator of a melanoma's metastatic potential and a potential tool in evaluating treatment efficacy. The ultimate goal is to develop a sensitive imaging device that will allow accurate evaluation of the risk of melanoma recurrence and metastases, that may facilitate treatment monitoring.

fPAM for the in Vivo Depth Measurement of Pigmented Lesions and Melanoma Depth

Pilot Study to Determine the Feasibility and Functionality of fPAM Imaging for the in Vivo Depth Measurement of Pigmented Lesions and Melanoma Depth

-The thickness as measured by fPAM will be compared with the thickness of the formalin fixed excised lesion.

Washington University School of Medicine

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
fPAM for the in Vivo Depth Measurement of Pigmented Lesions and Melanoma Depth	NCT02613325	Pigmented Skin ... Melanoma	Functional phot... Standard of car... Single cell pho...	18 Years -	Washington University School of Medicine
fPAM for the in Vivo Depth Measurement of Pigmented Lesions and Melanoma Depth	NCT02613325	Pigmented Skin ... Melanoma	Functional phot... Standard of car... Single cell pho...	18 Years -	Washington University School of Medicine

Spots Global Cancer Trial Database for single cell photoacoustic microscopy