MedGen

In some affected individuals, the patches have characteristics of both lichen and macular amyloidosis. These cases are called biphasic amyloidosis.

Nodular amyloidosis is characterized by firm, raised bumps (nodules) that are pink, red, or brown. These nodules often occur on the face, torso, limbs, or genitals and are typically not itchy.

In all forms of PLCA, the abnormal patches of skin usually arise in mid-adulthood. They can remain for months to years and may recur after disappearing, either at the same location or elsewhere. Very rarely, nodular amyloidosis progresses to a life-threatening condition called systemic amyloidosis, in which amyloid deposits accumulate in tissues and organs throughout the body.

In macular amyloidosis, the patches are flat and dark brown. The coloring can have a lacy (reticulated) or rippled appearance, although it is often uniform. Macular amyloidosis patches are most commonly found on the upper back, but they can also occur on other parts of the torso or on the limbs. These patches are mildly itchy.

Lichen amyloidosis is characterized by severely itchy patches of thickened skin with multiple small bumps. The patches are scaly and reddish brown in color. These patches usually occur on the shins but can also occur on the forearms, other parts of the legs, and elsewhere on the body.

Primary localized cutaneous amyloidosis (PLCA) is a condition in which clumps of abnormal proteins called amyloids build up in the skin, specifically in the wave-like projections (dermal papillae) between the top two layers of skin (the dermis and the epidermis). The primary feature of PLCA is patches of skin with abnormal texture or color. The appearance of these patches defines three forms of the condition: lichen amyloidosis, macular amyloidosis, and nodular amyloidosis. [from MedlinePlus Genetics]

A mucinous cystadenocarcinoma that involves the pancreas. [from MONDO]

A rare progressive neurodegenerative disorder with typical onset between 50 and 65 years of age. Manifestation is of progressive impairment of higher visual processing skills and other posterior cortical functions without any evidence of ocular abnormalities. Prevalence is unknown, largely due to the lack of awareness of the syndrome and the inaccurate terminology referring to it. Alzheimer''s disease is the most common underlying pathology, but cases attributable to Dementia with Lewy Bodies, corticobasal degeneration or prion disease have also been reported. [from SNOMEDCT_US]

A cartilaginous matrix-producing neoplasm characterized by the presence of neoplastic chondrocytes. There is no evidence of atypical or malignant cytological and architectural features, invasive features, or metastases. Representative examples include osteochondroma and chondroma. [from NCI]

A chronic form of pancreatitis. [from HPO]

The presence of inflammation in the pancreas. [from HPO]

A non-neoplastic or neoplastic disorder that affects the pancreas. Representative examples of non-neoplastic disorders include pancreatitis and pancreatic insufficiency. Representative examples of neoplastic disorders include cystadenomas, carcinomas, lymphomas, and neuroendocrine neoplasms. [from NCI]

Absence or abnormal closure of the choana (the posterior nasal aperture). Most embryologists believe that posterior choanal atresia results from a failure of rupture between the 35th and 38th day of fetal life of the partition which separates the bucconasal or buccopharyngeal membranes. The resultant choanal atresia may be unilateral or bilateral, bony or membranous, complete or incomplete. In over 90 per cent of cases the obstruction is bony, while in the remainder it is membranous. The bony type of atresia is commonly located 1-2 mm. anterior to the posterior edge of the hard palate, and the osseous septum varies in thickness from 1 to 10 mm. In the membranous form of choanal atresia the obstruction usually occurs further posteriorly. In approximately one third of cases the atresia is bilateral. [from HPO]