What are satellite nodules lung?

Satellite nodules were defined as well-circumscribed acces- sory carcinoma foci adjacent to but clearly separated from the main tumor by normal lung parenchyma (Fig. I). All were smaller than the primary carcinoma and most were located within the same lobe.

What is a satellite tumor?

Listen to pronunciation. (SA-teh-lite TOO-mer) A group of tumor cells in an area near the primary (original) tumor. In melanoma, satellite tumors occur within 2 centimeters of the primary tumor, on or under the skin, and can be seen without a microscope.

What are satellite lesions in melanoma?

Malignant melanoma often metastasizes through lymphatic channels to the skin or subcutaneous tissues, as well as to regional lymph nodes. Skin and subcutaneous lesions that occur within 2 cm of the primary tumor are known as satellite lesions, while those that occur beyond 2 cm are considered in-transit metastases.

Can satellite nodules be benign?

The results of this study show that indeterminate satellite lesions may be benign or represent a second primary lung cancer, and should not therefore be considered a contraindication to surgical exploration when a preliminary differential diagnosis by other means cannot be obtained.

Can benign lung nodules grow quickly?

Benign pulmonary nodules are just that—benign. There is very little growth or change, if there’s any at all. Cancerous pulmonary nodules, however, are known to grow relatively quickly—usually doubling in size every four months but sometimes as fast as every 25 days.

What is a satellite lesion?

The term “satellite lesions” is used in many conditions in dermatology, generally to describe smaller lesions near the edges of a principal lesion.

What stage is in transit melanoma?

The presence of in-transit metastases indicates either N2 or N3 status under the current AJCC TNM system, and is classified as stage IIIB or C disease, respectively. In-transit melanoma carries a poor prognosis, with 5-year survival rates ranging from 25% to 30% in most reports [12, 20, 21].

What does melanoma in transit look like?

Melanoma in transit metastases typically appear as erythematous nodules of variable size that may or may not be pigmented. Occasionally, the lesions are flat rather than nodular depending on their location in the epidermis, dermis, or subcutaneous tissue.

What is satellite metastasis melanoma?

Satellites are defined empirically as any foci of clinically evident cutaneous and/or subcutaneous metastases occurring within 2 cm of but discontinuous from the primary melanoma and in-transit metastases are similarly defined but occurring >2 cm from the primary melanoma in the region between the primary and the …

Should I worry about a 4mm lung nodule?

A nodule is generally considered small if it is less than 9 mm in diameter. Should I worry that I have a small nodule? Usually a small nodule (less than 9 mm) is not a cancer, but it still could be an early cancer.

Should I be concerned about a lung nodule?

Most lung nodules are benign, or non-cancerous. In fact, only 3 or 4 out of 100 lung nodules end up being cancerous, or less than five percent. But, lung nodules should always be further evaluated for cancer, even if they’re small.

Where does melanoma spread first?

Normally, the first place a melanoma tumor metastasizes to is the lymph nodes, by literally draining melanoma cells into the lymphatic fluid, which carries the melanoma cells through the lymphatic channels to the nearest lymph node basin.

Are there satellite nodules in breast and lung cancer?

Satellite nodules are considered to be predictive of poor prognosis in breast cancer and in melanoma. In lung cancer, there is no information as to their definition, prevalence, or implication as a prognosis factor of survival after resection. Over the past 18 years (1969 to 1987), 84 patients under …

What is the size of a satellite nodule?

One of the 5 nodules, 23 x 19 mm in size, was hypoechoic and had a satellite nodule and calcification. Two other satellite nodules with similar characteristics were observed, one at the superior pole of the lesion and another at the inferior pole of the lesion, measuring 4 mm and 3.8 mm respectively.

What are the nodules in a CT scan?

Pulmonary nodules are small, rounded opacities within the pulmonary interstitium. Pulmonary nodules are common and, as the spatial resolution of CT scanners has increased, detection of smaller and smaller nodules has occurred, which are more often an incidental finding.

Can a tuberculoma have a satellite nodule?

Multiple satellite nodules occur in 10 to 15% of all cases. Tuberculomas commonly appear as smooth maginated round nodules on CT with calcification, cavitation and satellite nodules sometimes seen. The tumor may be diffusely infiltrative with indistinct borders, and small satellite nodules can also be present. [4]