9 Mutasi Gen Tubuh Manusia Paling Aneh dan Langka
1. Mesenterium, Organ Baru pada Anatomi Manusia
Mesenterium, organ tubuh baru manusia yang baru-baru ini ditemukan oleh para ahli kedokteran memang bukanlah kelainan genetik, meskipun pendapat ini sendiri masih diragukan. Bermula dari temuan Profesor bedah asal Irlandia bernama Calvin Coffey yang mengatakan kalau Mesenterium merupakan membran berliku-liku yang terdapat di dalam usus manusia.
Berfungsi sebagai penghubung serta pengikat usus kecil dan besar manusia yang berada di dinding perut. Namun untuk lebih tepatnya Mesenterium masuk dalam klasifikasi anatomi tubuh yang lebih akurat kita masih terus melakukan penelitian lanjut, apakah ia bagian dalam sistem pencernaan, endokrin, kardiobaskular, sistem pembuluh darah atau sistem imun pertahanan tubuh, ungkap Prof Calvin Coffey.
2. Sirenomelia, Sindrom Putri Duyung

Fenomena putri duyung tak hanya ada dalam cerita disney, mitos rakyat maupun mamalia laut purba yang bernama Duyung (Dugong dugon). Dalam dunia medis, sindrom Sirenomelia sangatlah aneh dan menyeramkan dan kasus gen ini sangat langka ditemukan. Karena ketika janin bayi terlahir dari rahim ibunya ia akan mengalami kondisi aneh pada tubuhnya, yakni kedua kakinya dempet (mengapit, menempel) persis seperti penampakan ikan duyung.

Kedua tulang kaki mereka bisa menyatu atau terlahir hanya dengan satu kaki saja, dan bayi malang tersebut pun sangat riskan mengalami kerusakan organ tubuh lainnya. Tak jarang bayi yang terlahir seperti ikan duyung akan mengalami kematian akibat komplikasi kandung kemih dan ginjal yang menyatu.

Meskipun beberapa kasus ada bayi duyung yang beruntung bisa diselamatkan nyawanya dan sampai sekarang pun bisa hidup normal setelah kedua kakinya yang menempel di operasi bedah. Namun langkah pembedahan ini tidak bisa dilakukan langsung, harus menunggu beberapa tahun saat sang bayi duyung dirasa sudah cukup usia.
3. Tulang Keras Tak bisa Patah seperti Robot
Berbanding terbalik dari osteoporosis dimana kualitas kepadatan tulang pada tubuh kita menurun sehingga menyebabkan kondisi tulang keropos bahkan retak. Dan genetik yang mengontrol kepadatan tulang kita ini bernama Low-density lipoprotein receptor-related protein 5 (LRP5). Meski langka, dalam beberapa kasus pernah terjadi mutasi gen aneh pada tulang manusia, yakni tulangnya mengeras kaku bahkan mustahil untuk dipatahkan.
4. Manusia Kayu atau Manusia Patung
Mirip seperti kasus genetik langka diatas, angka penderita penyakit Fibrodysplasia Ossificans Progressiva (FOP) baru dilaporkan sebanyak 708 kali dari seluruh dunia. Penyakit FOP dimana pengidapnya mengalami kelainan jaringan berserat pada otot, tendon serta ligamennya menjadi mengeras kaku dan membuat dalaman tulang menjadi rusak, dalam arti lain jaringan syaraf yang rusak ini akan keras seperti tulang.
sumber:kejadiananeh.com
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